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Maintenance and repair
Required accessories
•
Frequency meter (C)
with sensor head (B)
for measuring the belt
tension.
1.
Determine the
permissible frequency
range (see table).
2.
Turn on the frequency
meter (C) and hold the
sensor head (B) over the
belt.
3.
Strike the toothed
belt gently to read the
frequency f.
Compare the frequency f
with the table.
b
x l
[mm]
f [Hz]
WT
WT
455 x 455
63 ±5
455 x 650
81 ±5
650 x 650
39 ±4
650 x 845
43 ±4
845 x 845
27 ±3
845 x 1040
27 ±3
If the frequency is within
the specifi ed range:
•
the belt tension is correct.
If the frequency is not
within the specifi ed range:
Tension/slacken the
toothed belt with the
adjusting screw (D)
until the appropriate
frequency is calibrated.
Bosch Rexroth AG, MIT: HQ 5/H, HQ 5/XH, 3 842 558 544/2017-07
10.4.2
Adjusting the belt tensioner with a frequency meter
A
!
B
Fig. 22:
Adjusting the belt tensioner on the HQ 5 with a frequency meter
l
C
L
!
!
SW4
D
SW10
557 617-38
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