MTD 638 - Manual (Page 13)

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.
2. Using a 1/2 inch wrench, remove three nuts and
lock washers which secure the pump to the cou­
pling shield. Two nuts are at the bottom corners
and one is in the top center.
3. Remove the pump.
4. Rotate the engine by pulling starter handle until
engine coupling half set screw is at bottom.
Loosen set screw using 7/64 inch Allen wrench.
Slide coupling half off of engine shaft.
5. 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 down.
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 cou­
pling 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 inch 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 cou­
pling half with set screw. See figure 18.
NOTE: Make certain proper clearance is obtained
before tightening set screw.
12. Reattach spark plug wire to spark plug.
PUMP
7.
8
.
9.
10
.
11
.
ommended pressure). Maximum tire pressure under
any circumstances is 30 p.s.i. Equal tire pressure
should be maintained on all tires.
When installing a tire to the rim, be certain rim is
clean and free of rust. Lubricate both the tire and rim
generously. Never inflate to over 30 p.s.i. to seat
beads.
A
WARNING: Excessive pressure (over 30
p.s.i.) when seating beads may cause
tire/rim assembiy to burst with force suf­
ficient to cause serious injury.
OFF-SEASON STORAGE
If the log splitter will not be used for a period longer
than 30 days, the following steps should be taken to
prepare the log splitter for storage.
1. Clean the engine and the entire log splitter thor­
oughly.
2. Refer to the engine manual for correct engine
storage instructions. Follow instructions care­
fully.
3. Wipe unit with an oiled rag to prevent rust, espe­
cially wedge and beam.
NOTE: When storing any type of power equipment in
an unventilated or metal storage shed, care should be
taken to rustproof the equipment by coating with a
light oil or silicone.
4. The tongue can be removed and reattached in an
upright position as shown in figure 19 to take less
space when storing.
5. Store unit in a clean, dry area. Do not store next
to corrosive materials, such as fertilizer.
TIRES
Recommended operating tire pressure is 12 to 15
p.s.i. (sidewall of tire may give tire manufacturer’s rec­
FIGURE 19.
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