TM 5-3805-290-23-1
TROUBLESHOOTING WITHOUT A DIAGNOSTIC CODE - CONTINUED
0008 00
Table 7. Hydraulic System Troubleshooting - Continued.
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
1. Check for air in system.
1. If air is present, refer to Malfunction
6.
Hydraulic Circuit is
11, There Are Air Bubbles in Oil in this
Hammering.
work package.
2. If problem exists, go to Test 2.
2. Perform Relief Valve Line Test and
If problem still exists, go to Test 3.
Adjustment (WP 0017 00).
3. Margin pressure is not correct. Refer to If problem still exists, adjust pilot system
pressure. Refer to Pilot System Pressure
Piston Pump Pressure Test and
Adjustment (WP 0017 00).
Test (WP 0017 00).
Make sure ride control switch is not in ON
1. Move ride control switch to OFF
7.
Boom Raises but Will Not
position (TM 5-3805-290-10).
position.
Lower.
2. If problem still exists, refer to
Malfunction 8, Boom Will Not Raise
and Lower in this work package.
1. Determine malfunction.
If no other functions are operating
8.
Boom Will Not Raise or
correctly, refer to Malfunction 2, No
Lower.
Functions Will Operate or All Functions
Operate Slowly in this work package.
2. Check lift cylinders for damage.
1. If damaged, replace lift cylinders (WP
0129 00).
2. If problem still exists, go to Test 3.
3. Check mechanical boom linkage for
1. Repair damage (WP 0201 00).
damage.
2. If problem still exists, replace pilot
control valve (WP 0188 00).
3. If problem still exists, replace ride
control valve (WP 0123 00).
4. Replace lift cylinder(s) (WP 0129 00).
5. Replace main control valve (WP 0189 00).
1. Determine malfunction.
If no other functions are operating
9.
Cannot Tilt Bucket in
correctly, refer to Malfunction 2, No
Either Direction.
Functions Will Operate or All Functions
Operate Slowly in this work package.
2. Check tilt cylinders for damage.
1. If damaged, replace tilt cylinders (WP
0128 00).
2. If problem still exists, go to Test 3.
3. Line relief valves or combination valve 1. Check and adjust settings for line relief
are not operating correctly.
valves (WP 0017 00).
2. If problem still exists, replace pilot
control valve (WP 0188 00).
3. Replace lift cylinder(s) (WP 0129 00).
4. Replace main control valve (WP 0189 00).
