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AIR SYSTEM HAS NO EFFECT ON BRAKING (HARD BRAKING).
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TM-5-2420-224-20-1 Tractor Wheeled 4x4 DED Small Emplacement Excavator (SEE) and High Mobility Material Handler (HMMH) Manual
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STEERING WHEEL HAS TOO MUCH PLAY.
TM 5-2420-224-20-1
Table 3-5. Troubleshooting (Cont)
Malfunction
Test or Inspection
Corrective Action
BRAKES AND AIR SYSTEM (CONT)
NOTE
When fluid regulating valve reaches cut-out pressure, there will be an audible "pop."
a.
Start and run engine at idle until fluid regulating valve reaches cut-out
pressure.
b.
Read pressure on dual brake gage. Reading must be approximately
106 psi.
If reading is not approximately 106 psi, turn fluid regulating
valve adjusting screw (1) 1/4-turn to right to increase pressure,
or 1/4-turn to left to decrease pressure. Relieve air pressure
(page 2-23) from air tanks to approximately 80 psi and repeat
steps a and b until cut-out pressure is approximately 106 psi.
If correct cut-out pressure cannot be attained, replace fluid
regulating valve (page 4-306).
If problem continues, notify direct support maintenance.
STEERING
90.
STEERING WHEEL HARD TO MOVE FULL RIGHT AND FULL LEFT.
Step 1.
Check for low oil level in power steering tank.
If oil level is low, add oil (TM 5-2420-224-10).
If oil level is not low, go to step 2.
Step 2.
Check for loose and damaged V-belt on power steering pump.
If V-belt is loose or damaged, tighten or replace V-belt
(page 4-356).
If V-belt is not loose or damaged, go to step 3.
Step 3.
Check for damaged power steering lines.
If power steering lines are damaged, replace power steering
lines (page 4-357).
If power steering lines are not damaged, go to step 4.
Step 4.
Check for clogged power steering filter element.
If filter element is clogged, replace filter element (page 4-359).
If filter element is not clogged, notify direct support maintenance.
Change 2

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