Winget 200TM, Workshop Manual

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WORKSHOP MANUAL
Winget Mechanically Fed Mixers
Models: 200TM
From 1998
are visible. Mark the position of the sprocket on the shaft and remove the grubscrew
and key, tapping the sprocket backward on the shaft away from the key will assist in
the removal of the key.
Smear the bore of the new sprocket with anti-seize compound and slide onto the
shaft upto the mark made earlier. Fit the key and grubscrew, due to manufacturing
differences it may be necessary to fit a new key. Reposition the engine, refit the bolts
and drive chain, confirm the chain is correctly aligned and check the chain tension.
The chain tension is correct when the chain deflects approximately 5mm about the
centre line, the deflection should be checked midway between the lower sprocket and
upper chainwheel.
Add or subtract shims below the engine to correctly tension the chain.
A chain running too tight will cause starting problems and the increased loadings will
increase the rate of wear on the chain and sprocket and may also damage the
crankshaft bearings. A chain running too slack may run off the sprocket or
chainwheel.
Refit the guards, not forgetting the plastic plug, top plate closing plate and exhaust
extension. Refit the engine housing support bracket and panel, reconnect the battery.
Hydraulic Pump Removal/Replacement-Hydraulic PTO (Not Direct Drive)
The hydraulic pump is secured via four studs to an adapter plate, which is in turn
bolted to the engine gearcover, and it is not possible to remove the pump without
removing the backplate. The pump is driven by a gear mounted on the pump shaft, it
being driven by a gear bolted to the end of the crankshaft. The pump being clockwise
rotation.
Ensure any residual hydraulic pressure is dissipated as previously described. Place a
suitable container below the hydraulic pump to catch any hydraulic and engine oil
spills, remove and plug the supply and feed hoses and plug the ports in the pump to
prevent the ingress of dirt and foreign matter.
Remove the four nuts and bolts securing the backplate to the engine and carefully
remove the pump and backplate assembly. Note early backplates are fitted with a
gasket between the plate and gearcover whilst later engines have an ‘O’ Ring fitted.
Hold the assembly in a suitable soft jawed vice and bend back the tabs on the
tabwasher locking the driven gear retaining nut. Remove the nut and any washers,
the gear is keyed onto a tapered shaft using a small woodruff key, remove the gear
taking care not to lose the key.
Remove the four small nuts and washers holding the pump to the backplate and
remove the pump, taking care not to damage the gasket sandwiched between the
two. Clean any sealing compound from the mating surfaces.