Thwaites SPRITE NIMBUS, Manual

Page: 11 / 54

PRECAUTIONS AFTER RE-ASSEMBLY
IMPORTANT: Wire the conical nut to the clutch slide, refit the chain guard and
clutch operating arm. The gap between the clutch operating arm and the clutch
thrust bearing should be 9/16" when the clutch is fully adjusted (2 ton model).
Dimensions for Sprite, Nimbus, Orion and Tusker machines - see system drawing -
refer to dimension ‘B’.
When clutch has been relined it is advisable to re-adjust after 2 or 3 days work.
DO NOT allow the gap between the clutch operating arm and the clutch thrust
bearing to close, this will cause clutch slip. It is advisable to adjust clutch when the
gap closes to ¼" on the 2 ton Alldrive and 1/8" on all other models.
To adjust the clutch on site, a special clutch adjusting spanner is provided with each
machine. Two people are required, one to sit on the machine and depress the clutch
pedal and the other to adjust the clutch.
Engage starting handle in starting dog, turn handle until the square headed
adjusting screw is in line with the cut out on the face of the chain guard, insert
special spanner and adjust as described in previous paragraph.
The clutch unit illustrated is that fitted on the 2 ton Alldrive machine.
NOTE : Ideal working clearance for dimension ‘A’ is 1/64". More than 1/64" results in
excessive clutch wear.
SERVICING NOTE : (Bearings Item 76).
It is advisable that the clutch drum bearings are packed with high melting point
grease every 12 months.
7-1-13