MTD 500 thru 510 Operator's Manual page 11

Drain the fluid and flush the reservoir tank and hoses
with kerosene whenever any repair work is performed
on the tank, hydraulic pump or valve. Contaminants in
the fluid will damage the hydraulic components.
NOTE: The flushing the reservoir tank is recommended
to be performed by an authorized service dealer.
WARNING: Use extreme caution when
working with kerosene. It is an extremely
flammable fluid.
Hydraulic Filter
Change the hydraulic filter every 50 hours of operation.
Use only a 10 micron hydraulic filter. Order part number
723-0405.
Beam And Splitting Wedge
Lubricate both sides of the beam (where it comes into
contact with the splitting wedge) before each use with
engine oil. The wedge plate on the log splitter is
designed so the gibs on the side of the wedge plate can
be removed and rotated and/or turned over for even
wear.Make certain to readjust the adjustment bolts so
wedge moves freely, but no excess space exists
between the wedge plate and beam.
Hose Clamps
Check the hose clamps on the suction hose (attached
to side of the pump) for proper tightness before each
use. Check the hose clamps on the return hose at least
once a season.
Engine
Refer to the separate engine manual for all engine
maintenance instructions.
Flexible Pump Coupler
The flexible pump coupler is a nylon "spider" insert,
located between the pump and engine shaft. Over a
period of time, the coupler will harden and deteriorate.
Replacement is needed if you detect vibration or noise
coming from the area between the engine and the
pump. If the coupler fails completely, you will
experience a loss of power.
Never hit the engine shaft in any manner,
IMPORTANT:
as a blow will cause permanent damage to the engine.
When replacing the flexible pump coupler, proceed as
follows:
• Remove three nuts and lock washers that secure
the pump to the coupling shield. Two nuts are at the
bottom corners and one is in the top center.
• Remove the pump.
• Rotate the engine by slowly pulling starter handle
until engine coupling half set screw is at bottom.
Loosen set screw using allen wrench and slide
coupling half off of engine shaft.
• Loosen set screw on pump coupling half and
remove coupling half.
• Slide new engine coupling half onto the engine
shaft until the end of the shaft is flush with the inner
portion of the coupling half. (There must be space
between end of the engine support bracket and
coupling half). Tighten set screw.
• Install pump coupling half and key on pump shaft.
Rotate coupling half until set screw faces opening
in shield. Do not tighten set screw.
• Install nylon "spider" onto engine coupling half.
• Align pump coupling half with nylon "spider" by
rotating engine using starter handle. Slide coupling
half into place while guiding three mounting bolts
through holes in pump support bracket.
• Secure with nuts and washers removed earlier.
• Set .010" to .060" clearance between the nylon
"spider" and the engine coupling half by sliding a
matchbook cover between the nylon "spider" and
the engine coupling half and moving pump coupling
half as needed. Secure pump coupling half with set
screw. See Figure 11.
NOTE: Make certain proper clearance is obtained
before tightening set screw.
Set
Screw
Nylon
"Spider"
Insert
Clearance
Tires
See sidewall of tire for recommended pressure.
Maximum tire pressure under any circumstances is 30
p.s.i. Equal tire pressure should be maintained on all
tires.
WARNING: Excessive pressure (over 30
p.s.i.) when seating beads may cause tire/
rim assembly to burst with force sufficient
to cause serious injury.
11
Gear Pump
Steel
Coupling
Halves
Engine
Figure 11