TM 5-3805-290-23-1
STEERING SYSTEM TESTS, INSPECTIONS, AND ADJUSTMENTS - CONTINUED
0016 00
STEERING TIME CHECK
0016 00
WAR N I N G
Permit only one operator on machine. Keep other personnel away from machine and in sight of operator.
Failure to follow this warning may result in injury or death to personnel.
1.
Start engine (TM 5-3805-290-10).
2.
Run engine at high idle (TM 5-3805-290-10).
3.
Turn steering wheel to either left or right until steering stop is contacted.
4.
Turn steering wheel from steering stop to opposite steering stop. Record time needed.
5.
Turn steering wheel from steering stop back to opposite steering stop. Record time needed.
6.
Run machine at low idle (TM 5-3805-290-10).
7.
Turn steering wheel to left or right until steering stop is contacted.
8.
Turn steering wheel from steering stop to opposite steering stop. Record time needed.
9.
Turn steering wheel from steering stop back to opposite steering stop. Record time needed.
10.
Disengage parking brake (TM 5-3805-290-10).
11.
Run engine at high idle (TM 5-3805-290-10).
12.
Turn steering wheel to left or right until steering stop is contacted.
13.
Turn steering wheel from steering stop to opposite steering stop. Record time needed.
14.
Turn steering wheel from steering stop back to opposite steering stop. Record time needed.
15.
Run machine at low idle (TM 5-3805-290-10).
16.
Turn steering wheel to left or right until steering stop is contacted.
17.
Turn steering wheel from steering stop to opposite steering stop. Record time needed.
18.
Turn steering wheel from steering stop back to opposite steering stop. Record time needed.
19.
Engage parking brake (TM 5-3805-290-10).
20.
Stop engine (TM 5-3805-290-10).
N OT E
While parking brake is disengaged, difference between left turn and right turn must not differ by more
than 0.3 seconds. While parking brake is engaged, difference between left turn and right turn should
increase by no more than 0.2 seconds.
21.
At all engine high idle speeds, steering times should be 1.6 seconds.
22.
At all engine low idle speeds, steering times should be 3.7 seconds.
23.
Compare recorded times with proper times. If times match, steering pump is working properly.
a.
If times do not match, one of these conditions may be present:
(1)
Pressure setting for backup relief valve is not within specifications.
(2)
Pump is not upstroking.
(3)
Pump may have excessive wear.
b.
Measure main relief pressure (WP 0017 00). If main relief pressure is low, cycle times should be retested after
main relief pressure has been corrected.
c.
Test pressure of steering pump to ensure that pump is upstroking (refer to Piston Pump (Steering and Pilot) High
Pressure Stall Test and Adjustment in this work package).