Quadivator ST50 Assembly/Operators/Parts Manual page 27

8.3 Adjusting Drive Belt Tension
Drive Belt Tension is adjusted two ways, one with the slack side tension spring located on the LHS
of the impeller drive between the ATV & ST50 and secondly with the belt tensioning device at the
rear of the Power Unit.
8.4 Replacement of the Drive Belt
The Drive Belt – Quadivator Part # 89513 – runs from the rear Power Unit through two sets of
idlers on the power unit, one idler on the Interframe to the front drive pulley on the ST50.
If the belt is still in place, but just worn – remove the tension from the front belt tension spring by
removing it! Then remove the belt from the front driven pulley.
Withdraw the worn belt from the rear of the Power Unit; install the new belt from the rear of the
Power Unit.
The springs should
elongated from fixed
length a minimum of
30mm (1.25") when
installed.
Spring Loaded – Belt
Idler Tension Arm.
Tighten the adjuster bolts clockwise and ensure
the spring at the front of the belt is a minimum
of 30mm (1.25") then re-tighten the 4 retaining
bolts to the Power Unit frame.
Loosen the 4 bolts
holding the engine
plate to the frame of
the Power Unit.