Cub Cadet 8404 - Manual (Page 208)

CHAPTER 7 8354/8404
7-20 D615-W03 May-2003
615W740A
9.5 CHECK FOR BACKLASH AND TOOTH
CONTACTED BETWEEN BEVEL PINION
SHAFT AND SPIRAL BEVEL GEAR
A. Backlash Measurement
1. Set dial gage in bevel gear shaft spline.
2. Lock spiral bevel gear, move bevel gear shaft by
hand and measure the backlash.
3. If exceeding the spec., adjust with shim and adjust-
ing collar.
B. Types of Adjusting Shim
0.8 mm (0.031 in.) 1.0 mm (0.039 in.)
1.2 mm (0.047 in.) 2.0 mm (0.079 in.)
2.3 mm (0.091 in.)
C. Types of Adjusting Collar
5.8 mm (0.228 in.) 5.9 mm (0.232 in.)
6.0 mm (0.236 in.) 6.1 mm (0.240 in.)
6.2 mm (0.244 in.)
D. Tooth Contacted Check
At spiral bevel gear, apply a few contacted surface from
three positions divided by circumference with thin film
of red lead and then apply bevel gear with load, rotate
bevel pinion shaft several times, and then check for
tooth contacted amount.
Sect. Allowable limit
Bevel gear backlash 0.10 ~ 0.30 mm
0.0039 ~ 0.0118 in.
Sect. Allowable limit
Bevel gear tooth
contacted More than 35 % center
1/3 ~ 1/2 from small end.