MBW AR57 - Manual (Page 14)

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5. Secure the gearbox to the guide tube using four
socket head cap screws (#35) and high collar
lockwashers (#21). Apply 243 Loctite. Handle Assembly
Refer to Handle Assembly, page 18.
1. Secure the handle (#7) to the shockmounts (#8)
using four whiz-lock screws (#11).
2. Reattach the hose (#3) to the motor (#22, page 14)
and secure with two new clamps (#9).
Part Replacement Cycles and Tolerances
Bearings
Replace anytime a bearing is rough, binding, discolored or removed from housing or
shaft.
Bearing, Bronze, Springbox Replace if there are wear marks or the ID is greater than 1.145 in (29mm).
Bellows Replace if the bellows are worn or cracked to the point of leaking.
Bushing, Bronze, Crankshaft Replace if there are wear marks or the ID is greater than 0.630 in (16mm).
Clutch
Replace shoes and spring if they show signs of heat damage or if the clutch does not
disengage below 2000 rpm.
Guide Bushings
Replace if a 0.025 in (0.635mm) feeler gage can be slide between the springbox and
the guide bushings.
Hardware
Replace any worn or damaged hardware as needed. Replacement hardware should
be grade 5 and zinc plated unless otherwise specified.
O-rings and Seals Replace at every tear down. Use MBW O-ring and seal kit #06472.
Motor Components Refer to the motor manufacturer’s Owner’s Manual.
Piston, Plastic, Springbox
Replace if a 0.025 in (0.635mm) feeler gage can be slide between the springbox and
the piston.
Piston Pin Replace if the OD is less than 0.620 in (15.75mm).
Piston Washers Replace if dished.
Ram Replace if shaft is less than 1.120 in (28.4mm).
Safety Decals Replace if they become damaged or illegible.
Seals & Gaskets Replace if a leak is detected and at every overhaul or tear down.