Exciter Drive Belts; Checking And Adjusting Belt Tension - Baumr-AG BCX650 User Manual

BCX650 Plate Compactor

Exciter Drive Belts

On new machines or after installing new belts, check the belt tension after the first 20 hours of
operation. Check and adjust the belt every 50 hours thereafter. • When replacing belts, always
replace both belts at the same time. • When installing or adjusting belt(s), ensure that the clutch and exciter
pulleys are aligned.
To ensure optimum power transmission from the engine to the exciter, the drive belts must be in good
condition and be correctly tensioned.

Checking and Adjusting Belt Tension

Correct belt tension is critical to machine performance and how long the belts will last. Inadequate tension
may cause the belts to slip, which will prevent the exciter from vibrating at the correct speed and will cause
excessive belt wear, glazing etc. Too much tension will cause premature belt failure and place unnecessary
stress on other machine parts. To check belt tension:
1. Remove the 2 bolts (A) securing the drive belt cover (B).
2. Check belt condition – if there is any cracking, fraying, or glazing, replace both belts.
3. Squeeze the belts together in the centre – belt deflection on each side should be 9mm (3/8") to 13mm
(1/2") with moderate pressure from your thumb or finger.
A
B
4. If the tension requires adjustment, loosen the 4 engine mounting bolts (C) slightly (do not remove) – just
enough to allow the engine to be moved.
5. Loosen the engine adjustment lock nuts (D), leaving sufficient space between the nuts and bracket for
the required engine movement.
6. Shift the engine toward the rear of the machine by rotating the adjustment bolts (E) right (clockwise) until
the belt tension is correct. Rotate both adjustment bolts the same amount so that the engine and belt
pulleys remain in alignment. If the engine cannot be moved any further and the belts remain "loose",
replace the belts.
D
E
7. Tighten engine adjustment lock nuts against the bracket.
8. Tighten the engine mount bolts.
9. Re-install the drive belt cover.
E&OE
9 to 13mm
C
E
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