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MAINTENANCE
MODEL 12XP CE
BELT TENSION
DO NOT IGNORE THIS MAINTENANCE RULE
New belts stretch very soon and must be
adjusted several times in the first few hours of
operation. Adjust after one hour of operation, then
every four hours until the belts quit stretching. Failure
to do this will cause the belts to burn and fly off.
THIS FAILURE IS NOT COVERED BY
WARRANTY!
GENERAL RULES FOR TENSIONING
PUMP DRIVE BELTS (IF EQUIPPED)
1.
Check tensioning during the first 2 through 48
hours of run-in operation especially.
2. Over tensioning or under tensioning shortens
belt and bearing life.
3. Keep belts free from foreign materials that may
cause the belt to slip.
4. Make V-drive inspection on a periodic basis.
Never use belt dressing as this will damage the
belt and cause early failure.
5. Belts should never be forced over the sheave.
Allow enough room for belts to slip on.
6. Always make sure sheaves are aligned properly.
1. Remove beltshield.
2. To adjust the belt tension, loosen the four engine
mounting bolts and the jam nuts on the engine
adjuster on the radiator end of the engine.
3. Adjust the belt tension with the engine adjuster
on the clutch end of the engine. If you have to
push the engine with the adjuster, the belts will
tighten slightly after the engine is realigned.
4. Use the engine adjuster on the radiator end of the
engine to realign the engine, so the engine sheave
and chipper sheave are aligned. The sheaves can
be checked with a string or straight edge.
5. Torque the two engine mounting bolts (see Torque
Chart for the correct torque) on the opposite side
of the engine from the engine adjusters.
6. Loosen the jam nuts on the engine adjuster on
the radiator end of the engine.
7. Torque the engine mount bolt and then tighten
the engine adjuster jam nuts on the radiator end.
8. Hand tighten the remaining engine mount bolt.
Loosen the engine adjuster jam nuts all the way
and torque the engine mount bolt.
9. Tighten the engine adjuster jam nuts on the
clutch end.
10. Recheck the belt tension and alignment, if
readjustment is needed go back to step 2.
11. Reinstall beltshield.
MAIN DRIVE BELTS
1. Follow all pre-maintenance shut down procedures.
2. Locate the center of the span between sheaves.
3. Push or pull down on the belt until the belt has
deflected 6.4 mm (1/4”).
4. Record push or pull down force. The force should
be 5.4 kg (12 lbs).
5. Adjust the belt tension if the force falls outside
of this range.
1. Follow all pre-maintenance shut down procedures.
2. Locate the center of the belt span between the
sheaves.
3. Push or pull down on the belt until the belt has
deflected 9.5 mm (3/8”)
4. Record the push or pull down force. The force
should be 27.2 to 29.0 kg (60 to 64 lbs.).
5. Adjust the belt tension if the force fall outside
of this range.
ADJUSTMENT PROCEDURE
NOTICE
DANGER
Before attempting any type of maintenance,
disengage clutch, wait for the drum to come to a complete
stop, turn off engine, remove the ignition key, make
sure the ignition key is in your possession, install the
drum lock pin, and disconnect the battery.
It is a good practice to rotate the sheaves during
tensioning. Then recheck deflections. The belts may
need to be tightened again.
Do not over tighten the hydraulic pump belt. Most
all pump failures result from too much side load on
the pump shaft. Too much belt tension is very easy to
detect inside a failed pump. Pumps with this condition
will not be covered under warranty.
Every month, the beltshield needs to be removed
and the belts need to be checked and adjusted. For
best results use a good belt tension tester. The slot
in the beltshield is for a quick daily check of the belt
tension.
If belts are not properly adjusted belts will slip,
glaze over, and be ruined.
THIS FAILURE IS NOT
COVERED BY WARRANTY!
Keep hands clear of all pinch points.
NOTICE
NOTICE
NOTICE
DANGER
WARNING
