TM 5-3805-296-23-2
0120
Table 1. Hydraulic and Steering Pump Makes Unusual Noise and Cylinder Rods
Do Not Move Evenly - Continued.
0120
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
Hydraulic and Steering
8. Have assistant fully raise bowl and
Pressure Difference as Specified
Pump Makes Unusual Noise
hold joystick in raise position
Have assistant lower bowl to ground
and Cylinder Rods Do Not
(TM 5-3805-296-10). Read and
and release joystick
Move Evenly Continued
note pressure on both gauges
(TM 5-3805-296-10).
(Figure 1, Item 3) (Figure 2, I
Have assistant release throttle lock and
tem 3). Subtract lower pressure
return engine speed to idle
reading from higher pressure
(TM 5-3805-296-10).
reading. The difference must be
Have assistant turn ignition switch and
2190 75 psi (15,100 500 kPa).
battery disconnect switch to OFF
position (TM 5-3805-296-10).
Remove test equipment.
Replace hydraulic and steering pump
(WP 0393).
Proceed to Test Step 4.
Pressure Difference Not as Specified
Have assistant lower bowl to ground
and release joystick
(TM 5-3805-296-10).
Have assistant release throttle lock and
return engine speed to idle
(TM 5-3805-296-10).
Have assistant turn ignition switch and
battery disconnect switch to OFF
position (TM 5-3805-296-10).
Proceed to Test Step 3.
Test Step 3. Test Main Relief Valve
Adjustment.
NOTE
Pressure is adjusted by turing retainer assembly on main relief valve.
Turn retainer assembly either clockwise to increase pressure or
counterclockwise to decrease pressure. One complete turn of retainer
assembly changes pressure approximately 1015 psi (7,000 kPa). If, for
example, recorded pressure difference is only 1800 psi (12,411 kPa),
then turn retainer assembly 1/3 turn clockwise to increase pressure by
approximately 338 psi (2,330 kPa) and bring pressure difference into
specification.
1. Remove cap (Figure 5, Item 2)
from retainer assembly
(Figure 5, Item 1).
NOTE
Do not allow retainer assembly to turn when loosening or tightening nut
on main relief valve.
2. Loosen nut (Figure 5, Item 3), turn
retainer assembly
(Figure 5, Item 1) as necessary to
bring pressure difference into
specification, and tighten nut.
0120-8
