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Maintenance
Safety, Operation and Maintenance Manual - Aug 2012
5-63
SY115C9/135C/155H Crawler Hydraulic Excavator
5.8.5 Every 250 service hours
5.8.5.1 Compressor belt tension - inspect/
adjust
Always prepare your machine as required
and lock/tag it out before proceeding.
See
“Preparing the machine” on page 2-58 and
“Lock-out and tag-out” on page 2-60.
Inspection
With a force of about 58.8N (6kgf), press with
your finger the middle section of the belt be-
tween the drive pulley (1) and the compressor
pulley (2) in order to check the de
fl
ection (A),
which should be 5-8mm (0.20in-0.31in).
Reference
Use a tension meter to check the belt tension
of the compressor.
New Belt
Used Belt
637
±
108 (N)
(65
±
11 (kgf))
441
±
88.2 (N)
(45
±
9 (kgf))
Adjustment
1. Loosen the bolts (1) and (2).
2. Move the compressor (3) and its bracket (4)
in order to adjust belt tension.
3. Tighten the bolt (1) and (2) after positioning
the compressor (3).
4. Check again the belt tensioning device
after adjustment.
A
CZ335-1104054
Compressor pulley
Drive pulley
Fig. 5-60
Fig. 5-61
Table 5-12
1
2
3
4
CZ215-1104019
Содержание SY115C9
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Страница 403: ...Specifications SY115C9 135C 155H Crawler Hydraulic Excavator 7 2 Safety Operation and Maintenance Manual Aug 2012 ...