Post on 23-Apr-2020
IH-S-3388+
IInntteerr nnaattiioonnaallHHaarr vveesstteerr
Service Manual3388, 3588, 3788,6388, 6588 & 6788
Volume 1 of 2
THIS IS A MANUAL PRODUCED BY JENSALES INC. WITHOUT THE AUTHORIZATION OF INTERNATIONAL HARVESTER OR IT’S SUCCESSORS. INTERNATIONAL HARVESTER AND IT’S SUCCESSORS
ARE NOT RESPONSIBLE FOR THE QUALITY OR ACCURACY OF THIS MANUAL.
TRADE MARKS AND TRADE NAMES CONTAINED AND USED HEREIN ARE THOSE OF OTHERS, AND ARE USED HERE IN A DESCRIPTIVE SENSE TO REFER TO THE PRODUCTS OF OTHERS.
Serv
ice
Man
ual
, , ,
Due to a continuous program of research and development, some procedures, specifications and parts may be altered in a constant effort to improve our products.
When changes and improvements are made in our products, periodic revisions may be made to this manual to keep it up-to-date. It is suggested that customers contact their dealer for information on the latest revision.
NOTE: Some illustrations in this manual show equipment not currently available. The illustrations are used primarily to cover serviceability and may not always represent production equipment.
LIBRARY FILING INFORMATION
File this manual, GSS-1490-2, after Divider Tab GSS-1490. Destroy manual GSS-1490-1.
CHASSIS 3388,3588,3788,
6388, 6588 & 6788 Tractors
GSS·1490·2 w/Revision 1 August, 1983
NOTE: Refer to the following service manuals for service information not contained in this manual: GSS-1052-C Testing and Servicing Electrical Equipment GSS-1427 -1 300 and 400 Series Diesel Engines and Fuel System
(American Bosch) GSS-1455-1 GSS-1281-K GSS-1492
Basic Air Conditioning Clutches Recharging Hydraulic Accumulators
I
General Contents
Safe Work Rules ............................................................ . IV Standard Torque Data for Nuts and Bolts ......................................... . VI Metric Converstion Tables .......... " ........................................ . VIII Standard Torque Data for Hydraulic Tubes and Fittings ............................. . X Flangette Bearing Installation .................................................. . XII Special Service Tools Required ................................................. . XIII Service Information System (S.I.S.) ............................................. . XVIII
III
Section 1
AIC AND TRACTOR SPLITS
Contents
Page
Air Conditioning Specifications ............................................. 1-2 Efficiency Test Procedure. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4 Special Torques. . . . . . • . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-6
Air Conditioning Components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-7
Windshield Wiper Motor 1-10
Door Striker Adjustment 1-11
Recirculation Rod and Door (3388, 3588 and 3788) ............................. 1-12
Recirculation Rod and Door (6388, 6588 and 6788) ........................ , . . . . . 1-16
Split Between Transfer Case and Transmission. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-18
Rear Split - Control Center on the Speed Transmission (Includes Splitting the Axle Housings) ....................................... 1-30
Rear Split - Control Center on the Speed Transmission (Without Splitting the Axle Housings) ....................................... 1-47
Rear Split - Control Center on the Rear Frame Housing (Speed Transmission Overhaul) ............................................. 1-63
Isomounts. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-85
Tractor Ballast ........................................................... 1-86
NOTE: Refer to Service Manuals GSS-1455-1 Basic Air Conditioning and Heating and GSS-1281-K Clutches.
1-1
Section 2
FRONT AXLE ASSEMBLY
Contents
NOTE: Refer to Section 1 for Tractor Ballast.
Page
Front Axle Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 2-3
Axle Carrier Disassembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 2-7 Reassembly and Adjustment ................................................... 2-10
Axle Differential and Pinion Pinion ................................................................... 2-15 Differential ............................................................... 2-17 Pinion and Differential Adjustment ............................................. 2-21
Front Axle Installation 2-25
Planetary Assembly ........................................................... 2-27
2-1
Section 3
STEERING
Contents
Page
Specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1
Steering Cylinder. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-2
Cylinder Bushings .......................................................... 3-6
Steering Hand Pump .................................................... . . . . 3-10
Specifications
NOTE: For troubleshooting the steering hydraulic circuit refer to Section 15. Testing the hydraulic system.
Power steering relief valve opening pressure •
Special Torques Recirculation valve ball plug Upper cover capscrews • • • End cover capscrews • • • • Steering wheel retaining nut Telescoping shaft locking collar
GSS-1490-2 (Rev. No.1)
. . . . . . . . .
3-1
14823 to 17926 kPa (2150 to 2600 psi) at 2400 rpm
14 to 19 N· m (10 to 14 ft. lbs.) 24 to 30 N' m (18 to 22 ft. lbs.) 24 to 30 N· m (18 to 22 ft. Ibs.) 43 to 50 N' m (32 to 37 ft. Ibs.)
• • • • • • . • • •• Hand Tight
Printed in the United States of America
Section 4
ENGINE
Contents
Page
Engine
Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 4·2
Installation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 4·6
NOTE: For service refer to GSS-1427-1 on 300 & 400 Diesel Engines and Fuel Systems.
4-1
~" ...•
Section 5
FUEL SYSTEM AND HOODS
Contents
Page
Main Fuel Tank. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 5-2
Auxiliary Fuel System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 5-6
Troubleshooting .......................................................... 5-7
Auxiliary Fuel Tank . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 5-8
Front Hood and Rear Hood Adjustment .......................................... 5-9
NOTE: Refer to GSS-1427-1 for servicing the fuel injection pump.
5-1
Section 6
ELECTRICAL SYSTEM
Contents
Page
Specifications ............................................................ " 6-2
Digital Data Center (3388,3588 and 3788 Tractors) ............................... 6-4
Instrument Gauge. ... . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 6-15
Transducer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 6-15
Wiring Diagrams. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 6-16
Digital Data Center 1A (6388, 6588 and 6788 Tractors) ............................. 6-23
Troubleshooting. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 6-27
Transducer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 6-30
Instrument G~uge and/or Light Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 6-31
Wiring Diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 6-32
6-1
Section 7
COOLING SYSTEM
Contents
Page
Radiator
Removal. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 7-2
Installation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 7-2
7-1
Section 9
TRANSMISSION AND TRANSFER CASE
Contents Page
Special Torques .....•...............•.....••.................•............. 9-3
Transfer Case ....•........ . . . . . . . . . . . . • . . . . . . . . . . . . . . . . . . . • • . . . . . . . . . . . . . . . 9·4 Flywheel Shaft Adjustment. . . . . . • . • . . • . . • . . . . • . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-7 I nput/Output Shaft Adjustment ........•.•.................................. 9-9
Engine Drive Shaft Dampener .................•............................... 9-10
Power F low Gear Drive - 3388, 3588, 6388 and 6588 Tractors ....................... 9-12
Torque Amplifier Solenoid - 6388, 6588 and 6788 Tractors .....................•... 9-13
Transmission Brake - 6388, 6588 and 6788 Tractors. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-14
Power Flow Gear Drive - 3788 and 6788 - 3 Speed. . . . . . . . . . . . . . • . . . . . . . . . . . . . . . . . 9-15
Speed Transmission Disassembly ............................................•.. 9-17
Clutch Housing Repair Procedure ..........................................•... 9-22
Torque Amplifier Overhaul ........••......................•..........•....•.• 9-24
Speed Transmission Reassembly ......•.•........•........•.................... 9-37 Mainshaft - 4 Speed. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . • . . . . . . . . . . . . . 9-38 Mainshaft - 3 Speed. . . . . . . . . . . . . . . . . • • . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-40 Speed Transmission Spacer Installation .....................•............•..... 9-41
I PTO Drive Shaft . . . . . . . . . . . . . . . . . . . . . . • . . . . . . . . . . . . . . . . . . . . . . • . . . . . . . . . • . . . 9-44
IPTO Front Bearing Set-Up Procedure. . . . . . . . . . . . . . . . . . . . . . . . . • . . . . . . . . . . . . . • . . . 9-47
Speed Transmission Linkage - 3388, 3588 and 3788 Tractors ...•.................... 9-49
Speed Transmission Linkage - 6388, 6588 and 6788 Tractors. . . . . . . . . . . . . . . . . . . . . . . . . 9-50
T A Switch Adjustment - 6388, 6588 and 6788 Tractors. • . • . . • . . . . . . . . . . . . . . . . . . . . . • 9-52
Range Transmission Disassembly .. . . . • . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-53 Differential ..................•............................•............. 9-53 Mainshaft . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . • . . . . . . . . . . . . . . . . . . . . 9-54
9-1
Page
Reverse I die Shaft. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-56 Countershaft. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-57
Range Transmission Reassembly ............................................... 9-59 Countershaft. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-59 Countershaft Bearing Set-Up - 3388 and 6388 Tractors . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-61 Countershaft Bearing Set-Up - 3588, 3788, 6588 and 6788 Tractors . . . . . . . . . . . . . . . . . 9-62 Reverse I dler Shaft Assembly ............................................... 9-63 Power Take-Off Driven Shaft ............................................... 9-66 Mainshaft (Range Transmission) ............................................. 9-66 Differential ............................................................. 9-69
Range Transmission Linkage - 3388,3588 and 3788 Tractors. . . . . . . . . . . . . . . . . . . . . . . . .. 9-71
Range'Transmission Linkage Adjustment - 6388, 6588 and 6788 Tractors. . . . . . . . . . . . . . . 9-73
Park Lock Cover - 3388, 3588 and 3788 Tractors
Park Lock Cover - 6388,6588 and 6788 Tractors
Park Lock Adjustment - 6388, 6588 and 6788 Tractors ............................ .
Park Lock Linkage Adjustment - 3388, 3588 and 3788 Tractors ......... , ........... .
Four Wheel Drive Gear Case .................................................. .
Understanding the Lube Warning Light at Low Idle ............................... .
NOTE: Refer to Section 1 for Tractor Ballast and Section 14 for Hydraulic System Clean-Up Procedure.
9-2
9-74
9-76
9-87
9-88
9-90
9-96
Section 10
REAR DIFFERENTIAL
Contents
NOTE: Refer to Section 1 for Tractor Ballast, Section 9 for Removal of the Differential Assembly and Section 14 for Hydraulic System Clean-Up Procedure. Page
Specifications .............................................................. 10-1
Special Torques. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 10-1
Pinion and Differential Adjustment. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 10-2 Mounting Distance. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 10-3 Differential Bearing Preload ................................................ _. 10-4 Backlash ................................................................ 10-4
Differential Lock ........................................................... , 10-5
Rear Frame Cover Service ..................................................... 10-13
Draft Control Cylinder. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 10-16 Action Control Valve. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 10-21 Draft Control Valve ....................................................... , 10-21
Rockshaft ................................................................. 10-24
Torsion Bar and Crankarm Shaft Bushings. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 10-26
Specifications
Differential lock pressure. . . .
Special Torques
Differential case bolts nuts . . • • • • • • Range transmission mainshaft cage bolts Range transmission mainshaft nut • • • • • Differential bearing retainers • • ••••
Outer dual wheel hub clamp Inside bolts .••••. Outside baIts. • . .
Wedge lock wheel baIt.
.
10-1
. . . .
. . . . .
1426 to 2068 kPa (230 to 300 psi)
. . · · · · . . · · · · · · · · · · · ·
N·m
152 115 135 100
271 575
542
FT. LES.
112 85
100 73
200 425
400
Differential Bearing Pre-Load
4. With the differential in place, install both retainers without shims. Torque the left hand bearing retainer with three capscrews to 100 N' m (73 ft. lbs.).
5. Tighten the right hand bearing retainer with three capscrews to 11 N' m (100 in. lbs.) while rotating the differential ring gear.
6. Loosen the three capscrews and retorque them evenly to 2.3 N' m (20 in. lbs. ) while rotating the gear. Then without rotating the gear, torque evenly to 5.6 N" m (50 in. lbs.).
1. Differential bearing retainers 2. 15-141 Depth micrometer 3. Jack screws holes
10-4
NOTE: To assure that the bearings are seated tap the retainers using a rubber mallet.
7. Using a depth micrometer measure through the jack screw holes the distance from the outer surface of the retainers to the rear frame housing surface. Record the readings and average these figures.
8. Support the differential assembly and remove the RH differential bearing retainer. Using a micrometer record the thickness of the retainer flange.
The difference between steps 7 and 8 is the desired shim pack 2: 0.06 mm (2: .002 inch).
9. Divide the total shim pack for initial placement on the carrier assembly. Approximately 60% of the shims should be placed on the ring gear side.
10. Remove the LH carrier and place the remaining shims on the carrier and reinstall.
11. Torque the retainer mounting bolts to 100 N· m (73 ft. lbs.).
Backlash
12. USing 15-67-1 Dial Indicator Gauge take three readings 1200 apart on the ring gear. Backlash should be between .127 to .381 mm (.005 to .015 inch).
If necessary, move the retainer shims from one side to the other to accomplish backlash. Do not remove or add shims since this changes bearing preload.
NOTE: Refer to Section 12 for complete instructions on installing the brakes.
1. 15-67-1 Dial Indicator Gauge 2. Differential ring gear
Section 11
REAR AXLE HOUSING AND WHEELS
Contents
NOTE: Refer to Section 1 for Tractor Ballast and Section 14 for Hydraulic System Clean-Up Procedure.
Page
Special Torques.. .... .. . . ... .. .... . ... .. ........ .. .................... . .... 11-1
3388,3588,6388 & 6588 Rear Drive Axle Assembly. . . . . . .. .. .. .... . . .. .. . ... . .. .. 11-2
3788 & 6788 Rear Drive Axle Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 11-3
Rear Axle and Bull Pinion Shaft. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 11-4 Removal. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 11-4 Disassembly ...................... " ... .. . . . . .. . . ... . ... . . . . . . . . . . .. . .. .. 11-9 Reassembly and Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 11-10 Preloading the Bull Pinion Shaft Bearings....................................... 11-11 Rear Axle Bearings Preload Adjustment. . .... ........ .. ......... ........... .... 11-11
Outer Dual Wheel Hub Clamp Inside bolts . Outside bolts . . . .
Wedge Lock Wheel Bolt
Special Torques
11-1
N'm
271 575
542
Ft. Lbs.
200 425
400
Section 12
BRAKES
Contents
NOTE: Refer to Section 14 for Hydraulic Clean-Up Procedure.
Page
Specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 12-1
Power Hydraulic Multi-Disc Brakes ............................................. 12-2 Power Braking (Engine Running) ............................................. 12-3 Removal and Disassembly. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 12-4 Inspection. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 12-5 Reassembly ............................................................. 12-6 Installation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 12-7
Power Brake Valve. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 12-8 Removal ............................................................... 12-8 Disassembly ............................................................. 12-8 Inspection and Repair ..................................................... 12-10 Reassembly and Installation. . . .. .. .. . . . .. . . . . .. . .. . . ... ... . . . . • .. . . . ... . . . .. 12-10
Brake Pedal and Linkage Adjustment ........................................... 12-11
Brake Wear Switch Adjustment. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 12-13
Bleeding The Brakes. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 12-13
Specifications
Brake diameter - inches. • • • • • • • • • • • • • • • • • • • •• 279.4 mm (11 inches) Brake pressure - psi ••••••.•••••.• 1620-2137 kPa (235-310 psi)
12-1
Section 13
INDEPENDENT POWER TAKE-OFF
Contents Page
Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 13-1
IPTO Assembly Drawings. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 13-2
I PTO Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 13-5
Removing the IPTO from the Tractor ............................................ 13-6
Servicing I PTO Components. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 13-8 IPTO Pump .............................................................. 13-8 IPTO Clutch Pack Assembly .................. , . . . . . . . . . . . . . . . . . . . . . . . . . .. . . .. 13-14 IPTO Cover and Valve Housing. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 13-20
Installing the IPTO on the Tractor. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 13-25
I PTO Control Valve 3388 Tractor SIN 10999 and Below. . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 13-25
IPTO Control Valve 3388 Tractor SIN 11000 and Above -and All 3588, 3788, 6388, 6588 and 6788 Tractors ................................. 13-26
Rear Linkage Adjustment 3388,3588 & 3788 Tractors .............................. 13-27
Control Handle and Linkage Adjustment 3388, 3588 & 3788 Tractors .................. , 13-27
IPTO Cable Installation and Adjustment 6388,6588 and 6788 Tractors. . . . . . . . . . . . . . . . .. 13-29
Adjusting IPTO Pressure 3388 Tractor SIN 10999 and Below ......................... , 13-31
Adjusting IPTO Pressure 3388 Tractor SIN 11000 and Above - and All 3588,3788,6388,6588 and 6788 Tractors. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 13-33
Specifications
IPTO Pressure
3388 Tractor SIN 10999 and Below . 1585 to 1654 kPa (230 to 240 psi)
3388 Tractor SIN 11000 and Above - and All 3588, 3788, 6388, 6588 and 6788 Tractors ....... 1413 to 1482 kPa (205 to 215 psi)
13-1
Section 14
HYDRAULIC SYSTEM
Contents Page
Basic Hydraulic System. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 14-2
Operation of Power Priority Hydraulics ........................................... 14-11
Operation of Draft Control, Motor and Auxiliary Valves .............................. 14-17
Multiple Control Valve (MCV) .................................................. 14-29
Hydraulic Steering Pump ...................................................... 14-32
Hydraulic Hitch Pump and Compe'1sator .......................................... 14-36
Start-Up Procedure PPH Pump . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 14-42
Auxiliary Valve Service. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 14-43
Flow Control Valve .......................................................... 14-46
Motor Priority Valve· ........................................................ , 14-47
Sump Check Valve Service ..................................................... 14-51
Alternating Check Valves ...................................................... 14-52
Coupler Service . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 14-54
Hydraulic Seat .............................................................. 14-60
Recharging Accumulator in Hydraulic Seat ........................................ 14-63
Clean-Up Procedure .......................................................... 14-65
Checks and Adjustments ...................................................... 14-69
Lever Friction Adjustment ..................................................... 14-69
Drop Poppet Valve ........................................................... 14-70
Position Control Lever ........................................................ 14-73
Drop Control Valve 14-74
Load Control Lever .......................................................... 14-75
Internal Sensing Arm Adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 14-76
Variable Raise Rate .......................................................... 14-77
Position Control Accuracy ..................................................... 14-79
14-1
Section 15
TESTING HYDRAULIC SYSTEM
Contents
Page
Specifications .............................................................. 15-3
General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 15-5
Test No.1 Coupler Flow Rate ......................................................... 15-5
Test No.2 Hitch Raise Time 15-8 Interpreting Test Results .................................................... 15-9
Hydraulic System Analyzer (14-557) Installation .................................... 15-10
Test No.3 Pump Flow Rate and Cut-Off Pressure .......................................... 15-13
Test No.4 Pump Standby Pressure ............................. " ........ " ............. 15-14
Test No.5 Pump Differential Pressure. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 15-14
Hydraulic System Problems - Pump O. K.
Problem in Motor and Auxiliary Circuits •....................................... 15-15 Problem in Motor Circuit Only ................................................ 15-15 Problem in Auxiliary or Hitch Circuit .......................................... 15-15
Test No.6 Main System Cushion Relief Valve ........................................... " 15-16
Test No.7 Motor and Auxiliary Valve Flow Control ........................................ 15-17
Test No.8 Auxiliary Valve Unlatching Pressure ............................................ 15-18
15-1
Troubleshooting Charts PPH Hydraulics. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 15-20
Test No.9 Relief Valve Differential Pressure. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 15-27 Steering Supply FlowTest ................................................... 15-28
Test No. 10 Oil Cooler By-Pass Valve
Test No. 11 Testing Lube, TA and Direct Drive Pressures Lube, TA and Direct Drive Test Evaluation
Test No. 12 Brake Pressure
Troubleshooting Brakes
Test No. 13
15-29
15-30 15-32
15-36
15-37
Thermal By-Pass Test ............................. " .. , ....................... 15-39
Test No. 14 System Aeration Check 15-40
Preliminary Checks from the Tractor Seat .......................................... 15-43
15-2
7. Open the restrictor valve on the Flo-Rater. Unlock the tabs on the motor valve handle and leave it in the lower position. With the engine at rated speed, restrict the load valve on the Flo-Rater until unlatching takes place and observe this pressure reading. Unlatching pressure should occur between 13,789 to 16,892 kPa (2000 to 2450 psi).
NOTE: Refer to Test No. 8 if unlatching is a problem.
8. Open the Flo-Rater restrictor valve and reverse the Flo-Rater outlet hose to the bottom coupler port and reverse the inlet hose to the top coupler port.
Next engage the motor valve handle rearward (upper) position and secure it to prevent unlatching. Then repeat steps 5 and 6. After testing open the Flo-Rater restrictor valve.
If the flow specification can be obtained in one direction but not in the reverse direction then the motor valve is suspect.
1. Orifice screen behind plug 2. Orifice behind signal
line fitting
15-7
If flow and psi meets specifications on the motor valve then proceed to check all other auxiliary valves in the same manner.
NOTE: When checking other than the motor control valve, set the lock tabs so the float position cannot be obtained and tie the valve handle in the direction being tested.
If the flow specifications cannot be obtained in either direction then proceed as follows:
a. Check hydraulic oil filters.
b. Remove the plug and the signal line fitting from the pump flange. Using a screwdriver remove both orifices and clean the orifice screens.
c. Be sure the .508 mm (. 020 in. ) orifice is open. Retorque orifice screen to 9 to 10 N·m (7 to 8 ft. lbs.).
d. Check for system leaks around the pump flange. Recheck the flow.
e. If the flow and pressure is low at the auxiliary valves but OK at the motor valve then the motor check valve should be inspected for proper seating. This can be done by disconnecting the signal line at the motor priority valve. Operate the engine at low rpm and activate any of the auxiliary valves.
If the flow streams out beyond a few drops then the motor check valve is not properly seating and should be removed for inspection. Replace the motor check valve if necessary.
If pump flow is still below specifications then proceed to Test No.3.