W & H 154 Operator's Manual - page 13
REMOVAL OF POWER FEED UNIT
1) Disconnect power. Remove chip deflector and raise head 4”-5”.
2) Spin the arbor to find the set screw on the in-feed chain sprocket on the underside of the chain guard.
Using a 3/32” allen wrench, loosen the set screw.
3) Starting with the bolts on the chain guard, remove the three hex head bolts attaching the power unit to the
head.
4) Pull power unit free, removing the in-feed sprocket and chain at the same time. Remove the long chain
once the unit is partially free of the head.
DISASSEMBLY OF THE GEAR BOX
1) Loosen set screws on the P110 gear box mounted sprockets and pull them off the P209 drive shaft.
2) Remove P213 nylon bushing and P214 nylon washer.
3) Drain the oil.
4) Remove four socket head cap screws holding gear box onto the chain guard.
5) Tap on the two shafts with a soft hammer to separate the two housings.
6) Drive out P-504 large bronze gear assembly from outside of the gear box with a ¼” pin punch. Watch for
small spacer P-127.
7) Drive out 1/8” dowel pin P-143 joining upper P-115 bearing support plug to gear box. Push out the plug
with a screw driver from the inside of the gear box.
8) Remove P-503 secondary shaft assembly (small bronze gear). Wiggle it out of its socket and remove it
from the gear box through the open side of the gear box.
9) Remove the P-502 primary shaft assembly (small worm and slotted end shaft).
INSTALLATION OF POWER FEED UNIT
1)
Disconnect the power source to the machine. Remove any knives and bolts from the machine
arbor. Please note that the gear box/chain guard assembly shall be referred to in these instructions as the
power feed unit.
2)
The P-117 fiber drive should be in the end of the arbor. The out feed roller sprocket should be on
its shaft. Both swing arms are installed and all four pressure screw assemblies should be in place.
3)
The power feed unit should be fully assembled with the P-213 nylon bushing on the P-203
primary shaft (shaft with slot) and the P-214 nylon washer up against the P-213. Both P-110 gear box
mounted chain sprockets (sprockets with thin hubs) should be on the P-209 drive shaft, with the thin hubs
facing toward the chain guard. Leave a 1/32” gap between the innermost P-110 and the chain guard P-
202 (longer feed unit casting). Tighten the set screws in each of the sprockets onto the flat on the P-209
drive shaft.
4)
Install the long chain on the driving sprocket closest to the P-202 chain guard. Droop the chain
over and under and the nylon bushing P-213, and against the nylon washer P-214.
5)
Install the short chain over the outermost P-110 gearbox mounted sprocket. Engage the roller
sprocket (which is not on its shaft yet), in the short chain with the hub facing the machine head and the
set screw facing down for access later to tighten it.
6)
With the attaching bolts nearby, pick up the power feed unit and first engage the long chain on
its roller sprocket. Next, engage the in feed roller sprocket on its shaft and at the same time insert the
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