Bandit 20XP - CHIPPER BELT TENSION

Bandit
62
Copyright 12/17
MODEL 20XP
GENERAL RULES FOR TENSIONING
TENSIONING PROCEDURE
Pump Drive Belts (If equipped)
It is a good practice to rotate the belts during tensioning. Then recheck deections. The belts may need to
be tightened again.
lbs./belt (kg/belt) is per 1 belt. If equipped with 4 groove poly band belt, lbs./belt (kg/belt) must be multiplied by
4. If equipped with two 3 groove poly band belts, lbs./belt (kg/belt) must be multiplied by 3 for each poly band
belt. If equipped with 2 groove poly band belts, lbs./belt (kg/belt) must be multiplied by 2 for each poly band belt.
MAINTENANCE
CHIPPER BELT TENSION
NOTICE
NOTICE
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.
NOTICE
New belts stretch very soon and must be adjusted several times in the rst 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 y o󰀨. THIS FAILURE IS NOT COVERED BY WARRANTY!
NOTICE
DO NOT IGNORE THIS MAINTENANCE RULE!
1. Check tensioning during the rst 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.
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.
NOTICE
Follow all pre-maintenance shut down procedures. Locate the center of the belt span between the sheaves.
Push or pull on the belt until the belt has deected 7/8” to 1” (22.2 to 25.4 mm). Record the push or pull force.
The force should be 28 lbs./belt (13 kg/belt). If the machine has poly band belts, see note below. Adjust the
belt tension if the force falls outside of this range. If belts are not properly adjusted belts will slip, glaze over,
and be ruined. This is NOT covered by warranty.
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. Locate the center of the span between sheaves.
2. Push or pull down on the belt until the belt has deected 1/4” (6.4 mm).
3. Record push or pull down force. The force should be 14 to 17 lbs (6.4 to 7.7 kg).
4. Adjust the belt tension if the force falls outside of this range.