Gravely 950001, Maintenance Manual

Page: 27 / 66

6 - 27
6.1 BELL HOUSING & COUPLING
Pump Mounting
A machined cast aluminum bell housing is used to
mount the hydraulic pump to the engine. It is important
that shaft end play clearance is present to prevent end
loading to either the pump or engine. Shaft end loading
can be very detrimental to both pump and engine bear-
ings.
Identification Of Coupling Parts
The coupling comprises three main parts:
1. The pump coupling half is secured to the pump
tapered shaft with a hexagon nut and a locking tab
washer. A Woodruff key transmits the driving force.
2. The Spider rubber insert allows for any small
misalignment that may exist.
3. The engine coupling half is secured to the engines
parallel output shaft with a set screw. A parallel key
transmits the driving force.
The machined rim edge of the pump half coupling is
used as a datum point when measuring for correct
position of the engine half coupling.
6.2 REMOVAL OF THE HYDRAULIC PUMP
BELL HOUSING AND COUPLING
1. Fully raise the lift arms and lock safely in position.
2. Disconnect and remove battery
3. Drain the hydraulic fluid from the reservoir until the
oil is below the pump suction hose.
4. Disconnect and remove the suction hose.
5. Disconnect and remove the hose between the
pump outlet and the pressure filter.
6. Remove the four (4) socket head cap screws
around the bell housing engine end (see below).
7. Withdraw the pump and bell housing from the
engine (see below).
8. Bend the tab of the tab washer away from the shaft
hexagon nut (see below).
9. Insert bar through the peep hole to jam pump
coupling half then remove pump shaft nut (see
below).
SECTION 6 - DRIVE TRAIN
PUMP HALF COUPLING
SPIDER INSERT
ENGINE HALF COUPLING
MACHINED RIM EDGE
DATUM POINT FOR
MEASUREMENT