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Maintenance and inspection procedures
5Maintenance and Inspection
(4) Timing belt tension
Fig.5-9 : Belt tension
The timing belt can satisfactorily convey the drive and keep a durable force only when it has an adequate tension.
The belt tension should not be too tight or too lose. Instead, it should be adjusted to a degree that elasticity is felt
when the belt is pressed with the thumb. If the belt tension is too weak, the belt loosening side will vibrate. On the
other hand, if the belt tension is too strong, a sharp sound will be heard and the belt tension side will vibrate.
The detailed adjustment (tension) is shown in
Check and adjust with the belt pressing force f and the slack amount d between span s.
T
T
T
T
f : Pressing force
s : Span
d : Slack
T : Tension
Axis
Belt type
Sepang : s mm
Slack
: d mm
Tension
: T (N)
Remarks
RH-6SQH series
J3
453-3GT-6
159
2.5
2
J4 (Motoe side)
357-3GT-6
79
1.2
2
J4 (Shuft side)
303-3GT-12
75
1.2
4
RH-12SQH/18SQH series
J3
666-3GT-12
239
3.7
4
RH-12SQH series
681-3GT-12
238
3.7
4
RH-18SQH series
J4 (Motoe side)
540-3GT-6
134
2.1
2
J4 (Shuft side)
471-3GT-15
107
1.7
5