Hydraulic
System
Reelmaster 6500-D/6700-D Hydraulic SystemPage 4 - 37
TEST NO. 1: Traction Circuit Charge Pressure
1. Make sure hydraulic oil is at normal operating tem-
perature by operatingthe machinefor approximately 10
minutes.
2. Make sure machine is parked on alevel surface with
the cutting units lowered and off. Make sure engine is
off.
CAUTION
Prevent personal injury and/or damage to equip-
ment. Read all WARNINGS, CAUTIONS, and Pre-
cautions for Hydraulic Testing at the beginning
of this section.
3. Connect a 1000 PSI gauge onto charge pressure
test port (Fig. 13).
4. Start the engine and put throttle at full engine speed
(3200 RPM) with no load on the system.
GAUGE READING: 220 to 280 PSI.
5. If there is no pressure, or pressure is low, check for
restriction in pump intake line. Inspect charge relief
valve and valve seat. C harge pressure can be adjusted
by changing shim thickness behind the relief valve
spring. Disassemble charge pump and check for inter-
nal damage or worn parts.
6. Start the engine and put throttle at full engine speed
(3200 RPM). Apply the brakes and push the traction
pedalforward,then reverse.Takeagaugereadingwhile
operating the machine in forward and reverse.
GAUGE READING: 220 to 280 PSI.
7. If pressure is good under no load, but drops below
specification when under traction load, the piston pump
should be suspected of wear and inefficiency. When the
pump is worn or damaged the charge pump is not able
to keep up with the internal leakage.
1
Figure 13
1. Charge Pressure Test Port
