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HYDRAULICS: Hydraulic Reservoir (continued)
Change hydraulic oil every 600 hours or 3 years.
To drain the reservoir:
1. Loosen hydraulic fitting and remove dipstick as
described under "To add hydraulic oil",
previous page.
2. Disconnect the pump supply hose (A) from the
pump.
NOTE: A drain pan with a capacity of 130 litres
(35 U.S. gallons) will be required.
Hydraulic Oil Filter
Change hydraulic oil filter (B) after the first 100
hours operation and every 250 hours thereafter.
To change:
1. Clean around the filter head.
2. Remove the filter and clean the gasket surface
of the filter head.
3. Apply a thin film of clean oil to the gasket on
the new filter.
4. Install new filter. Turn the filter onto the mount
until the gasket contacts the filter head. Tighten
the filter an additional 1/2 to 3/4 turn by hand.
IMPORTANT: Do not use a filter wrench to install
the filter. Over-tightening can damage gasket and
filter.
Hydraulic Relief Pressure
A possible cause of poor cutting performance
and/or excessive heating of hydraulic oil is low
relief pressure. Relief valve (D) is factory set at
4000 psi (27.6 MPa). See your dealer for
adjustment or service. A pressure gauge can be
installed at tapped elbow (C).
ELECTRICAL
Use electrical tape and wire clips as required to
prevent wires from dragging or rubbing.
Keep lights clean and replace burnt bulbs.
To replace light bulbs:
1. Using a phillips screwdriver, remove screws (B)
from fixture, freeing amber cover.
2. Replace bulb, plastic lens, and reinstall screws.
NOTE: Bulb trade #1156.
Wiring Harness:
White - ground
Brown - red tail light
Form # 147008
MAINTENANCE/SERVICE
Yellow - L/H amber
Green - R/H amber
46
Pump & Gearbox Matching – Pump (P) and
gearbox (G) must be properly matched for 540 or
1000 rpm. If problems arise related to RPM (sickle
plugging, vibration etc.), check that components
are matched as follows:
540 RPM: Pump 73428 LA_ with Box 77020_ _
1000 RPM: Pump 73424 LA_ with Box 77030_ _
Model numbers are stamped on the pump
mounting flange and the gearbox front plate.
A
G
P
•
ENSURE RPM MATCH AT PUMP/GEARBOX
•
DRAIN RESERVOIR AT PUMP SUPPLY HOSE
B
OIL FILTER & RELIEF VALVE
REPLACING LIGHT BULBS
D
C
B
Issue 12/05
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