TEST NO. 2: Checking Counterbalance Pressure
1. Make sure hydraulic oil is at normal operating
temperature by operating machine for approximately 10
minutes.
2. Lower cutting units, engage parking brake and stop
t
he engine.
3. Remove access cover from in front of auxiliary pump.
4. Install a 1000 PSI gauge into the counterbalance
quick disconnect fitting.
5. Start the engine, move throttle to full speed
(2500 rpm) and observe gauge.
TESTER READING: 300 - 400 PSI (oil at normal
operating temperature)
Counterbalance Relief Valve Adjustment
(
If equipped with adjustable valve)
6. Remove access cover from in front of lift control valve.
NORMAL SETTING:
300 - 400 PSI (oil at normal operating temperature)
MAXIMUM QUALITY OF CUT:
300 PSI (oil at normal operating temperature)
j
j
j
j
When ad usting counterbalance relief valve,
do not unscrew relief valve ad uster too far.
Watch pressure gauge while ad usting valve.
Stop unscrewing valve ad uster when pres-
sure no longer decreases.
CAUTION
7. If necessary, adjust the relief valve screw until the
desired pressure is attained. Adjust nearer the high end
of the range for improved hill climbing or nearer the low
end for improved quality-of-cut.
1
Figure 11
1. Counterbalance/lift circuit test port (S/N 39999 & below)
1
Figure 11A
1. Counterbalance/lift circuit test port (S/N 40001 & UP)
1
Figure 12
1. Adjustable counterbalance relief valve
Reelmaster
®
335-D Page 4 - 25
Rev. A
Testing
To Next Page
Loading...
