17MAINTENANCE continued
Inspect machine for loose bolts before starting engine. Maximum Vacuum: See Maximum Vacuum found in Operation section on page 5. The debris Bag can be washed.
Lubrication: Using S.A.E. 30 weight oil or equivalent. See maintenance schedule.
Chain: See DRIVE section below.
Lower Control Ends: Oil moving parts, such as bail, and height control.
Grease: Wheels, Casters, and Rear Axle Bearings.
Tire air pressure: SP units only. Check at regular intervals & maintain. Rear SP tires at 24 psi. (17 kPa).
17.3DRIVE SP MODELS ONLY
Chains and Belts are normal replaceable wear items. A new chain should not be used on worn sprockets. Sprockets should be replaced when replacing chains.
Clutch Cable Nut
Clutch
Cable
Adjustment
Up to tighten belt
BELT ADJUSTMENT
As
tightening or by loosening clutch cable nut | as required. See | |
figure 3 & 4. When replacing belt, see impeller removal on | ||
page 10. See parts list for impeller bolt torque specifications. |
| |
DO NOT OVER ADJUST. | 70 | |
CHAIN LUBRICATION
With machine not running, oil chain using general S.A.E. 30 weight oil every 25 hours or as needed. Note: Be sure that entire length of chain is properly oiled. Oiling only a few positions in the chain rotation will not properly oil the chain.
CHAIN ADJUSTMENTS
1. Remove chain guard
2.Inspect chains and sprockets for wear, lubrication and tension. Replace if badly worn or damaged.
CHAIN TENSION AND ALIGNMENT
3.Install new chain, locating keeper clip of chain connecting link on inboard side of chain.
4.Reinstall bearing onto axle and assemble bearing mounting screws. Leave screws only partially tightened.
5.Push bearings outward against each rear wheel, fully spreading wheels to both ends of axle.
6.With bearings pressed fully outward against wheels, keeping axle square with engine base, align and tension chain, and slightly tighten front bearing screws first. Then slightly tighten rear bearings. (Note: Tightening front of bearings first, helps keep chain tight.)
7.Recheck chain alignment, tension and axle squareness. If ok, fully tighten front and then rear bearing screws. Repeat adjustment steps if necessary.
8.Check chain tension and roll wheels to be sure there are no excessively tight areas in the chain. Readjust if necessary.
A slightly loose chain is better than an over tightened one.
9.Reinstall chain guard.
10.Reinstall spark plug wire.
Part No. 800012 | Page 11 of 12 |
Down to loosen belt
7536
Belt
Pulley
Turns
Freely
Neutral Position
Fig. 3
75
0.06 (1.5mm) 0.125 (3.3mm)
0.06 (1.5mm)
0.125 (3.3mm)
Engaged Drive Position: Belt guides should clear belt by 0.06" - 0.125" (1.5mm - 3.3mm)
Fig. 4