Toomey Earthmovers 4500B, User Handbook Manual

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4500B USER HANDBOOK
Page 27
4.2.4 Apron Assembly
Remove the bolts holding the main apron pivot pins and remove the pins, lock washers and nuts.
Remove the bearing retainer cap, bearing and sleeve from the side walls. Apply grease to the o-
ring in the side walls and insert the sleeve into the side wall.
Lift the apron assembly via the lifting provisions and carefully lower down between the side walls.
Align the bearing hole in side walls with the pivot pin hole in the apron. Apply anti-seize to the
apron bosses.
Insert the threaded pin into the apron boss and into the sleeve in the side walls stop short of
pushing it in all the way so that when installing the GE 90 Bearing, the bearing enters the housing
before the pin enters the bearing. Tap the bearing gently with a flat punch and small hammer to
get it started then use the bearing retainer and bolts to push the bearing into place. Once the gap
between the bearing retainer flange and boss in the side wall is around 20mm the threaded pin
can be driven into the bearing using a large soft mallet or a sledge hammer and block of wood.
Drive the pin in fully and secure the pin in place with the keeper plates and M16x30 hex screws.
Continue to tighten the bearing retainer pushing the bearing all the way into plate. Remove the
bearing retainer and install the lock washer and locking nuts. Tighten with Special Tool # 1.0 and
bend over lock washer tab to secure in plate. Half fill the bearing retainer with grease and then
install with the cap screws provided. Clean up any excess grease that escapes. The grease will
help keep moisture from entering the housing.
Lift the apron up so that the cylinder pins are accessible through the access holes in the side walls.
The top Stauff clamps may need to be unscrewed so the top hoses can be moved to allow the pin
to be installed. Install the apron cylinder pins in the same manner as the other pins. Lower the
apron and install the connecting linkages between the cross beam and apron.
NOTE: Anti-seize compound should be applied to all pins which are to be installed into the
hydraulic cylinder clevis bearings.