Allied Systems H5C Series, Service Manual

Page: 65 / 109

Service
3 - 6
Brake Pressure Check
All installations without optional DRAG-BRAKE
Test Equipment:
• (1) 1,000 psi (6,895 kPa) Gauge
Connect pressure gauge to test port:
• TP-BRAKE
Instructions
1. With the engine shut off, connect a 1000 psi pressure
gauge to the TP-BRAKE 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 pressure at this port should be
equal to the pilot supply pressure from the dozer. The
brake begins to release at 200 psi, and fully releases
at 300 psi. 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.
Figure 3-7 Test Equipment Setup
1000 PSI Gauge
at TP-BRAKE Port