Allied H12E, Service Manual

Page: 73 / 121

Service
3 - 10
LINE-OUT Pressure Check
All except installation on D155AX-6/-7 (K64), D8R Series II (C59), SD32DQ (U64)
Test Equipment:
• (1) 1,000 psi (6,895 kPa) Gauge
Connect pressure gauge to test port:
• RO
NOTICE
The values in Table 3-6 are based on
information available at time of publishing.
Refer to the service/maintenance manual
supplied with your dozer to verify the
available pilot pressure.
Instructions
1. With the engine shut off, connect a 1000 psi pressure
gauge in line on the RO hose at the control manifold.
2. Start dozer and set to high-free idle.
3. Measure pressure with the control lever in the LINE-
OUT position.
4. Pressure should be as specifi ed in Table 3-6.
If the LINE-OUT pressure is not as specifi ed in Table 3-6,
check for:
1. Improper pilot supply pressure.
2. Malfunctioning control lever.
3. Leaking pressure hoses or fi ttings.
4. Restriction in pressure hose or manifold port.
Table 3-6 Pilot Pressure Readings
Line-Out Hose
(RO Port)
Dozer
Pilot Pressure in
PSI [kPa]
Test Port RO
Komatsu
D275AX-5 (K65)
500 - 570
[3,447 - 3,930]
Komatsu
D85-15 (K50)
534 - 618
[3,682 - 4,261]
Liebherr
PR754 (L54)
290 - 350
[1,999 - 2,413]
Liebherr
PR756 (L56)
290 - 350
[1,999 - 2,413]
Liebherr
RL56 (L561)
335 - 365
[2,310 - 2,517]
CAT
D8T Tier 4 (C74)
400 - 450
[2,758 - 3,103]
John Deere
JD1050K (E75)
620 - 680
[4,275 - 4,688]
Figure 3-10 Test Equipment Setup