Allied H12E, Service Manual

Page: 74 / 121

Section 3
3 - 11
5000 PSI Gauge at
Motor Port A, then M5
Disconnect
and Plug Hose
and Cap Fitting
on Manifold
A
M5
PCOR Pressure Check
All except installation on SD32DQ (U64)
Test Equipment:
• (1) 5,000 psi (34,474 kPa) Gauge
Connect pressure gauges to test ports:
• Motor Port A
• M5
General
This test ensures that the PCOR setting on the motor is
set correctly relative to the dozer supply pressure.
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 3-11.
This will lock the winch brake to build pressure in the
motor.
3. Start dozer and set to high-free idle.
4. For installations with the “HI-SPEED” option, set the
switch to “HI-SPEED”.
5. Slowly move the joystick fully to the LINE-IN position.
6. The pressure at Motor Port A should be within the
range shown in Table 3-7.
Table 3-7 PCOR Pressure Readings
Dozer
PCOR Pressure in
PSI [kPa]
Motor Port A M5 (PCOR)
Komatsu
D155AX-6/-7 (K64)
3,771 - 4,207
[26,000 - 29,006]
3,280 - 3,480
[22,615 - 23,994]
Komatsu
D275AX-5 (K65)
3,781 - 4,179
[26,069 - 28,813]
3,280 - 3,480
[22,615 - 23,994]
Komatsu
D85-15 (K50)
3,070 - 3,270
[21,167 - 22,546]
2,400 - 2,600
[16,547 - 17,926]
Liebherr
PR754 (L54)
3,700 - 3,840
[25,511 - 26,476]
3,135 - 3,335
[21,615 - 22,994]
Liebherr
PR756 (L56)
3,500 - 3,700
[24,132 - 25,511]
3,135 - 3,335
[21,615 - 22,994]
Liebherr
RL56 (L561)
3,860 - 4,060
[26,614 - 27,993]
2,990 - 3,190
[20,615 - 21,994]
CAT
D8R Series II (C59)
3,300 - 3,500
[22,753 - 24,132]
2,990 - 3,190
[20,615 - 21,994]
CAT
D8T Tier 4 (C74)
3,430 - 3,532
[23,649 - 24,352]
2,990 - 3,190
[20,615 - 21,994]
John Deere
JD1050K (E75)
3,425 - 3,625
[23,615 - 24,994]
3,135 - 3,335
[21,615 - 22,994]
NOTICE
The values in Table 3-7 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.
7. Shut down the engine, and remove the gauge from
Motor Port A.
8. Connect the 5000 psi pressure gauge to port M5.
Note that port M5 is plugged, and you will need to
use fi ttings and hoses as available to connect your
gauge. The port is 9/16 - 18UNF.
9. Start dozer and set to high-free idle.
10. Slowly move the joystick in the LINE-IN direction,
noting pressures as they change with joystick position.
11. At some point, the pressure at M5 will stabilize. The
stabilized pressure at M5 is the PCOR setting.
12. Check Table 3-7 below. If the PCOR setting is not
within tolerance, or if the pressure read at M5 doesn’t
stabilize as described above, contact Allied Systems
Service Department.
Figure 3-11 Test Equipment Setup