Honda GX630 Technical Manual page 19

GX630 • GX660 • GX690 Technical Manual
When installing a pulley on the PTO shaft, use a tapered pulley bushing for security. This is a very effective method in
preventing the pulley from working loose when the inertia moment of the pulley and torque fluctuation is large.
The frame or engine bed must be rigid enough to prevent belt resonance in the working speed range of the engine.
Size the pulleys so they do not cause resonance of the belt(s).
STATIC RADIAL LOAD
(N)
6000
(lbf)
1200
5000
1000
4000
800
3000
600
2000
400
UPWARD PULL RANGE
1000
200
0
0 20
Distance from engine side cover
to center line of drive pulley
To reduce resonance, install a stay between the engine and attachment as shown below.
© 2010 American Honda Motor Co., Inc — All Rights Reserved
OTHER THAN
UPWARD PULL RANGE
40 60 80 100 120
ATTACHMENT
UPWARD
PULL
RANGE
90°
(mm)
DOWNWARD
PULL
RANGE
ENGINE
ENGINE PTO
BASE
17