Service
3 - 6
Brake Pressure Check
Test Equipment:
•
(1) 1,000 psi (6,895 kPa) Gauge
Connect pressure gauge to test port:
• TP-BRAKE
(or
TP-BR)
Instructions
1. With the engine shut off, connect a 1000 psi pressure
gauge to the
TP-BRAKE
(or
TP-BR
) pressure test
port on the control manifold.
2. Start dozer and set to high-free idle
3. Operate the winch in
LINE-IN
and
LINE-OUT
.
4. Check pressure. The brake requires 300 psi to release.
Low pressure will result in premature wear of the
friction discs and added heat generation.
If the brake pressure is not at least 300 psi, check for:
1. Improper pilot supply pressure.
2. Malfunctioning control lever; low
RI
and/or
RO
pressure.
3. Leaking pressure hoses or fi ttings.
4. Restriction in pressure hose or manifold port.
1000 PSI Gauge
at TP-BRAKE
(or TP-BR) Port
Figure 3-6 Test Equipment Setup
Summary of Contents for H12E
Page 8: ...vi Notes ...
Page 48: ...General 1 40 Notes ...
Page 54: ...Section 1 1 46 Figure 1 35 H12E Hydraulic Electrical Schematic Option Code B CAT D8T C74 ...
Page 55: ...Section 1 1 47 Figure 1 36 H12E Hydraulic Electrical Schematic Option Code D CAT D8T C74 ...
Page 59: ...Section 1 1 51 Figure 1 40 H12E Hydraulic Electrical Schematic Option Code D CAT D8R C59 ...
Page 63: ...Troubleshooting 2 4 Notes ...
Page 75: ...Service 3 12 Notes ...
Page 90: ...Section 4 4 15 Intentionally Blank ...
Page 102: ...Section 4 4 27 Intentionally Blank ...
Page 108: ...Section 4 4 33 Intentionally Blank ...
Page 116: ...Section 4 4 41 Intentionally Blank ...
Page 119: ...Repairs 4 44 Notes ...
Page 120: ......