MBW F46/4 - Manual (Page 15)

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Spider Bushing Replacement
Refer to Figure #9 for bushing installation:
1. Install (4) inner bushings into spider, using long side
of installation tool #60703 to ensure proper bushing
depth.
2. Using the opposite end or short end of installation tool
#06703, install (4) outer bushings into spider.
Parts Replacement Cycles and Tolerances
3/4 - 14 PIPE TAP
TUBE 1 1/4 I.D. X 4" LONG
6459 BUSHING
PUSH ROD 3/4" X 8 1/2"
Figure 8
Inner Bushing Outer Bushing
Figure 9
Air Cleaner Element
Replace after 100 hours if the engine is operating under good clean air conditions.
Service and replace more frequently if under more severe conditions.
Bearings
Replace anytime a bearing is rough, binding, discolored or removed from housing or
shaft.
Blades Replace when the edges become sharp or uneven. (Finish blades can be reversed)
Bushings, Trowel Arm
Replace if the trowel arm can be moved up and down more than 3/4 inch (19 mm) at
the end of the arm.
Carriage Bolts
Reset the height after trowel arm teardown or if the trowel develops chatter or
windmilling. Use height gage kit #07277 when setting.
Clutch Replace clutch if it does not disengage below 2000 rpm.
Gaskets and Seals Replace at every overhaul and teardown. Use MBW gasket and seal kit #05470.
Gearbox Oil
Replace after the first 50 hours of operation, then every 500 operating hours or yearly
thereafter.
Spark Plug Change after 75 hours of operation.
Torque Bolts
Re-torque all the bolts after the first eight hours of operation and check every 25
hours thereafter.
Worm Gear Replace if the teeth show wear marks or become sharp.
Worm Shaft Replace if the teeth show wear marks or become sharp.