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RG74DXH Operator · Service · Maintenance Manual
Operation
Pre-Starting Inspection
NOTICE
To ensure the long life and economical operation of
your stump cutter, we highly recommend that the
operator be well instructed in both the operation
and maintenance of this machine.
Inspect the hydraulic system for leaks. Check the hydraulic
oil level. Inspect the machine and perform each of the "Daily
Inspections" listed in the The Maintenance Manual as needed
before operating this machine.
Starting the Engine
UNDERSTAND AND HEED TO THE INSTRUCTIONS
LISTED IN THE SAFETY SECTION OF THE MANUAL.
IN IT'S ENTIRETY, BEFORE OPERATING STUMP
CUTTER MACHINE.
DO NOT operate the starter for more than 10
seconds at a time. If the engine does not start, allow
a 60 second cool-down period before re-attempting
to start. FAILURE TO FOLLOW THESE GUIDELINES
MAY CAUSE STARTER MOTOR FAILURE.
If the key switch (1) is released before the engine starts,
wait until the starter and the engine stops turning before
trying again. This will prevent pos si ble dam age to the starter
and/or flywheel.
If the temperature is extremely cold, it may be necessary to
use cold weather start ing aids. Follow the man u fac tur er's
recommended procedure when using starting aids.Always
change the hydraulic oil filter at the prop er times. Do not
allow the engine to run with out the filter installed. Failure to
heed either direc tive will result in poor machine performance
and se vere damage.
Pre-Operation Warm-Up
1. Allow the engine to warm up at low idle for two minutes.
2. To warm up the hy drau lic oil, move the engine throttle
to me di um engine speed. Run the engine for about two
minutes while intermit tent ly holding the cutting wheel
raise lever in the RAISE position.
3. Move the engine throttle to the max i mum engine speed. Run
the engine for an addition al two minutes while in ter mit tent ly
hold ing the cutting wheel raise lever in the RAISE position.
This will allow the oil to reach relief pres sure, which
causes it to warm up more rapidly.
26
NOTICE
4. Cycle all the controls to allow warm oil to circulate
through all the cylinders and lines.
Operator's Station
3
1
The operator's station is mounted on a swing-out arm for
optimum viewing of work while remaining protected. It must
be swung IN during machine transportation. The arm locks
in place, either IN or OUT. For example, to pull the arm (2)
out for machine operation lift the spring loaded locking pin
(3), out of the IN position hole, and swing out the operator's
station away from the cutting wheel, until the locking pin
springs into the OUT locked position.
The protective curtain is rolled up and held by the flexible
straps for when transporting machine. Unhook straps and roll
out curtain when operating machine. This provides protection
to the lower body.
Machine Controls
2
4
5
6
7
8
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