Section 3
3 - 5
Test Equipment:
•
(1) 5,000 psi (34,474 kPa) Gauge
Connect pressure gauge to test ports:
•
Motor Port A
•
Motor Port B
General
This test ensures that the motor is receiving the intended
hydraulic supply at both ports.
Instructions
1. With the engine shut off, connect a 5000 psi pressure
gauge to Motor Port A.
2. Disconnect and plug the brake release hose at the
control manifold, and cap the fi tting. See Figure 3-6.
This will lock the winch brake to build pressure in the
motor.
3. Start dozer and set to high-free idle.
4. Check the pressure at Motor Port A while operating
in
LINE-IN
. Check the pressure at Motor Port B while
operating in
LINE-OUT
. See Table 3-3.
5. When motor supply pressure check is complete,
remove gauge and reconnect brake release hose.
Motor Supply Pressure Check
All installations without optional
DRAG-BRAKE
Figure 3-6 Test Equipment Setup
Table 3-3 Hydraulic Pressure Readings
Dozer
Full Supply Pressure in
PSI [kPa]
Motor Port A
Motor Port B
Komatsu
D51-24 (K371)
3,350 - 3,500
[23,097 - 24,132]
3,350 - 3,500
[23,097 - 24,132]
CAT
D6K2 T4F (C805)
3,620 - 3,770
[24,959 - 25,993]
3,620 - 3,770
[24,959 - 25,993]
CNH
1650M (R42)
2,850 - 3,000
[19,650 - 20,684]
2,850 - 3,000
[19,650 - 20,684]
CNH
1150M (R371)
2,900 - 3,050
[19,995 - 21,029]
2,900 - 3,050
[19,995 - 21,029]
Liebherr
PR716 (L39)
3,040 - 3,190
[20,960 - 21,994]
3,040 - 3,190
[20,960 - 21,994]
If the motor supply pressure is not as specifi ed in Table
3-3, check for:
1. If pressure is too high, check dozer hydraulic system.
2. If it is too low, proceed with troubleshooting to
identify other possible problems, including a possibly
damaged motor or pump.
NOTICE
The values in Table 3-3 are based on
information available at time of publishing.
Refer to the service/maintenance manual
supplied with your dozer to verify the
available supply pressure.
5000 PSI Gauge
at Motor Port A
then Motor Port B
Disconnect
and Plug Hose
and Cap Fitting
on Manifold
B
A
Summary of Contents for H5C Series
Page 8: ...vi Notes...
Page 48: ...General 1 40 Notes...
Page 59: ...Troubleshooting 2 6 Notes...
Page 77: ...Service 3 18 Notes...
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Page 104: ...Section 4 4 27 Intentionally Blank...
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