Adj 1.6 Timing Belt Tension Adjustment - GBC eWire Service Manual

ADJ 1.6 Timing Belt Tension Adjustment

Maintaining proper tension on the Timing Belt is critical to proper
operation of the drive belt. If the belt is too loose, the belt will slip or
possibly become worn. If the belt is too tight, it will not move freely. This
procedure can be used for all belts within the eWire.
Inspection Procedure
1) Identify the timing belt.
2) Apply pressure to the Timing Belt and check the amount of deflection.
If the belt does not deflect at all and seems taut, the belt is likely too
tight. If the belt appears to be strained, it is likely too tight.
3) Apply pressure to the Timing Belt and measure the amount of
deflection. For longer Belts, slightly more deflection is allowable
compared to short belts but the belt should not deflect excessively. If
excessive deflection is noticed, or the belt teeth appear frayed, the
belt is likely too loose. Refer to the guidelines below
a) Belt length <100 mm: 1-2 mm deflection
b) Belt length >100 mm, <500 mm: 3-5 mm deflection
c) Belt length > 500 mm: 6-8 mm deflection
Repairs/Adjustments
Adjustment Procedure
1) Identify the adjustment location for the Timing Belt.
a) If the belt has a Tensioner Assembly, use the tensioner to adjust
belt tension.
b) If the motor bracket has slotted screws, loosen the motor
mounting screws, and slide the motor back or forward to adjust
tension.
c) If no slotted adjustment location is noted, loosen all screws that
secure belt pulley locations and apply pressure to slightly adjust
the pulley position. Secure the screws once proper tension is
attained.
2) Tighten all screws and verify the belt tension as indicated in
Inspection Procedure.
3) If it is impossible to achieve proper tension, replace the Timing Belt
with a new one.
01/26/2018
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GBC eWire