General Machine Products 89004 Portable Powered Duct Rod Pusher - Manual (Page 23)

Page 23 of 40
General Machine Products Co., Inc.
7. PROCEDURE FOR REPLACEMENT OF CHAIN DRIVES
Tools required:
6mm Allen Key 13mm wrench
INSURE THE HYDRAULIC HOSES ARE DISCONNECTED FROM THE PUSHING
MACHINE BEFORE CARRYING OUT THIS PROCEDURE.
Step 1
a. Disconnect the hydraulic motor from the top frame – using 6mm Allen Key.
b. Remove the stop washer on the bottom of the main jacking screw – using a 6 mm allen
key.
c. Unscrew the main clamping screw and separate the top and the bottom of the pusher unit.
Step 2
Bottom Housing – Chain Removal
a. Slacken the chain adjusters – using a 13mm wrench.
b. Remove the swing bolt from the side of unit – using a 13mm wrench.
c. Push the tensioner pin out through the sprocket assembly.
d. Remove the tension sprocket assembly.
e. Remove the chain-connecting link.
f. Remove the chain.
g. Check the chain support slide bars for wear and check the tension sprocket rotates freely,
prior to fitting the new chains.
h. Clean and re-lubricate the chain support slide bars.
Step 3
Bottom Housing – Chain Replacement
a. Pass the pre-lubricated chain round the drive sprocket. Feed the chain along the unit and
reconnect the chain-connecting link.
b. Align the tension sprocket with the chain and locate into position.
c.
Insert the tension pin through the tension sprocket, placing the tensioner pin spacer on the
tension pin. Refit swing bolt – using a 13mm wrench.
d.
Adjust the chain evenly via the swing bolts, checking free rotation of the chain. Do not
over tighten the chain.
Step 4
Top Housing – Chain Removal
a. Slacken the chain adjusters – using a 13mm wrench.
b. Remove the swing bolt from the side of unit – using a 13mm wrench.
c. Push the tensioner pin out through the sprocket assembly.
d. Remove the tension sprocket assembly.
e. Remove the chain-connecting link.
f. Remove the chain.
g. Check the chain support slide bars for wear and check the tension sprocket rotates freely,
prior to fitting the new chains.
h. Clean and re-lubricate the chain support slide bars.