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 TM 5-2410-237-23
HYDRAULIC SYSTEM TESTS - CONTINUED
0227 00
NOTE
Hydraulic system tests are performed when required by troubleshooting to confirm a problem or iden-
tify a faulty component within the system. These tests can also be performed after repair operations to
ensure faults have been corrected and performance is within specifications.
Hydraulic system tests consist of operating checks and analysis of test results to indicate if corrective
action is needed.
Perform PMCS for hydraulic system as outlined in WP 0009 00 and WP 0010 00 before performing
tests.
PRELIMINARY CHECKS
1.
A visual inspection of the system with the engine stopped should be the first step when performing hydraulic system
tests.
2.
With the blade and ripper (if equipped) resting on the ground and oil cool, perform the following inspections:
a.
Check oil level in hydraulic tank and add oil as needed (WP 0225 00).
b.
Remove filter element and filler strainer and check for foreign matter. Clean strainer and replace filter element as
needed (WP 0218 00).
c.
Inspect all lines, fittings and cylinders for damage or leakage. Make repairs as needed.
d.
Inspect all control linkages for bent, damaged or broken components. Make repairs as needed.
TEST SETUP AND OPERATIONAL CHECKS
WARNING
When testing and adjusting hydraulic system, always move machine away from traffic pattern and away
from personnel. Allow only one person on the machine. Keep all other personnel off to one side and within
view of the operator.
1.
Park machine in a safe location to perform tests.
2.
Start engine and lower blade.
3.
Warm up hydraulic system.
NOTE
An operational check of the hydraulic system is useful in detecting possible internal leakage, faulty valves
or a faulty pump.
4.
Perform the following operational checks:
a.
Raise, lower and tilt blade several times. If equipped with ripper, raise and lower ripper several times.
(1)
Watch cylinders as they extend and retract. Movement must be smooth and regular.
(2)
Listen for pump noise.
b.
Test and check adjustment of any area if a problem is found.
5.
Verify high idle is 2100 RPM +/- 60 RPM.
6.
Perform Tilt, Lift and Ripper Circuit Speed Tests below.
0227 00-2
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