TM 5-3805-262-34
Section VIl. HYDRAULIC SYSTEM MAINTENANCE
This section contains the information you need to maintain
the:
Hydraulic Pump
Control Valve Assembly
Hydraulic Control Levers and Linkages
Tilt Cylinder Assemblies
Bucket Height Control
Lift Cylinder Assemblies
Bucket Clamshell Cylinder Assemblies
Hydraulic Reservoir
It gives you information on how to repair or replace the
components that are within the scope of direct support
maintenance.
Hydraulic Pump Maintenance . . . . . . . .
Checks and Adjustments and
Flowmeter Tests . . . . . . . . . . . . . . . .
Main Relief Valve Pressure
Setting Check
. . . . . . . . . . . . . .
Main Relief Valve Pressure
Setting Adjustment . . . . . . . . . .
Nuetral Pressure Check . . . . . . . . .
Circuit Relief Valves Pressure
Setting Check and Adjustment.
Flowmeter Tests . . . . . . . . . . . . . . . .
Control Valve Assembly Maintenance.
Control Valve Assembly . . . . . . . . .
Lift Spool . . . . . . . . . . . . . . . . . . . . .
Tilt Spool
. . . . . . . . . . . . . . . . . .
clam spool
. . . . . . . . . . . . . . ..
Main Relief Valve . . . . . . . . . . . . . .
Para
3-20
3-21
3-21a
3-21b
3-21c
3-21d
3-21e
3-22
3-22a
3-22b
3-22c
3-22d
3-22e
Para
Load Check Valve . . . . . . . . . . . . . . 3-22f
Circuit Relief Valves . . . . . . . . . 3-22g
Anticavitation Valve . . . . . . . . . . 3-22h
Control Levers and Linkages
Maintenance . . . . . . . . . . . . . . . . . . . 3-23
Tilt Cylinder Assemblies
Maintenance . . . . . . . . . . . . . . . . . . . 3-24
Bucket Height Control Maintenance 3-25
Lift Cylinder Assemblies
Maintenance . . . . . . . . . . . . . . . . . . . 3-26
Bucket Clamshell Cylinder
Assemblies Maintenance . . . . . . . . 3-27
Hydraulic Reservoir Maintenance . . 3-28
Cleaning Hydraulic System . . . . . . . . 3-29
Removal of Contaminants . . . . . . . 3-29a
Flushing Water from Hydraulic
System . . . . . . . . . . . . . . . . . . . . . 3-29b
NOTE
In following paragraphs, resources required are not listed
unless they apply to the procedure. Personnel required are
listed only if the task requires more than one. If PERSONNEL
REQUIRED is not listed it means one person can do the task.
The normal standard equipment condition to start a
maintenance task is loader bucket lowered to ground, engine
off, loader parked on a level surface, and parking brake
applied. EQUIPMENT CONDITION is not listed unless some other
condition is required besides those indicated above.
3-611
