Traction Belt, Removal And Replacement; Carburetor Adjustments; High- And Low-Speed Adjustments; Mark 23 (Tillotson Hr24A Carburetor) - AMF MARK 23 (SD18E24A) Parts And Service Manual

GREASE SEALS AND BALL BEARINGS, REiVIOV AL
AND REPLACEMENT
Follow rear- and drive-sprocket assembly removal
and replacement instructions to remove and replace
seals and bearings.
TRACTION BELT, REMOVAL AND REPLACEMENT
1. Place sled on kickstand.
2. Remove bogie- wheel assemblies by removing
bolts (figure 7) and washers from each end of bogie-
wheel support shafts.
3. Pullout bogie-wheel assemblies.
4. Relieve traction-belt tension by loosening ad-
justing screws (3, figure 6).
5. Unlock torsion springs connected to support
arms.
6. Remove right- and left- hand adjusting-angle
locknuts (1).
7. Remove rear sprocket assembly.
8. Remove hood assembly and place sled on right
side.
9. Remove chain-housing cover plate.
10. Loosen chain- adjustment locknut and push down
on bolt to slacken drive chain.
11. Remove the sprocket from the drive shaft.
Figure 10
6
12. Using a screwdriver, carefully pry the oil seals
(figure 8) away from the ball bearings at each end of
the drive shaft.
13. Move the drive shaft and sprocket assembly
toward the right side of the sled until the shaft clears
the bearing and plate ass embly in the chain case
(figure 9).
14. Remove the drive shaft and sprocket assembly.
15. Remove the traction belt.
16. Replacement is essentially the reverse of re -
moval. Coat the sprocket bearings and pack the chain-
case housing with 1- 1/2 pints of No. 2 lithium bearing
grease. Align the traction belt and adjust traction belt
and drive chain tension.
CARBURETOR ADJUSTMENTS
CAUTION
Do not force mixture screws into seats.
Damage to the seat may occur and impair
carburetor performance.
1. Place sled on kickstand.
WARNING
Do not operate the engine in a closed area
unless it is adequately ventilated.
2. Start engine and permit to warm up.
HIGH- AND LOW-SPEED ADJUSTMENTS
Mark 23 (Tillotson HR24A Carburetor)
1. Turn the high- and low-speed mixture screws
into the seats (figure 10). DO NOT FORCE SCREWS
INTO SEATS.
Figure 11