26
9 INCH CHIPPER
SERVICE & MAINTENANCE
WARNING
BEFORE INSPECTING OR SERVICING ANY PART OF THIS MACHINE, SHUT OFF POWER SOURCE, DISENGAGE THE
HYDRAULICS, OPEN SHIELD AND MAKE SURE ALL MOVING PARTS HAVE COME TO A COMPLETE STOP.
Hydraulic fluid drives the feed roller. Check the fluid
level daily and fill as needed. The fluid and filter should
be changed and system cleaned if the fluid becomes
contaminated with foreign matter (water, dirt, grease, etc.)
or if the fluid has been subjected to temperatures greater
than the maximum recommended.
The hydraulic pump requires premium hydraulic fluids
containing high quality rust, oxidation, and foam inhibitors.
These include premium turbine oils, API CD engine oils
per SAE J183, M2C33F or G automatic transmission
fluids meeting Allison C-3 or Caterpillar TO-2, and certain
specialty agricultural tractor fluids.
In the unlikely event that the oil is completely drained
from the hydraulic system, oil must be added and any air
bubbles must be purged from the system. To do this:
1.
Clean all system components (reservoir, fittings, etc.).
2. Fill the hydraulic reservoir.
3. Start the engine and run at the lowest possible RPM.
4. As you purge air from the unit, the oil level in the
reservoir will drop and bubbles may appear in the
fluid. Refill the reservoir as necessary.
Failure to maintain proper fastening torque on bolts
may result in damage to the chipper and/or personal
injury!
WARNING
6.
Take the tension off the drive belt by depressing the
belt engagement pedal. Then, remove the drive belt
from pulleys. Using the push bolts from the bushing,
remove the bushing and pulley from the rotor shaft
by removing the three bolts in the sheave and putting
them in the threaded holes. Tighten the bolts equally
until the sheave loosens and can be removed.
7. Remove the set screw securing the rotor spacer on
the rotor side. Remove spacer from shaft.
8. Remove the four 1/2" bolts on belt side bearing and
take off the sensor bracket. Remove bearing and
discard.
5.12.2 REMOVING FEED ROLLER SIDE
BEARING
1. Lift the feed roller to the highest position and secure.
2. Remove the two 1/2" nuts securing the plastic bearing
cover.
3. Remove the 3/8" bolt holding the rotor shaft spacer.
Remove the spacer.
4. Remove the two 1/2" lock nuts, and the 1/2" bolts in
the opposite holes.
5. Remove bearing and discard.
6. Attach the belt side bearing and feed roller side
bearing to the frame with four 1/2" bolts for each
bearing. Re-attach sensor bracket to belt side bearing
using a top left bearing bolt. Tighten bolts to 75 ft-lbs.
7. Slide the feed roller side spacer onto the shaft. Making
sure the spacer is fully tight up against the bearing
collar, insert and tighten the 3/8" bolt.
8. Tighten and torque two set screws on each bearing
to 160 in-lbs.
9. Slide belt side collar on shaft against belt side bearing.
Make sure the collar set screw lines up with the
sensor. Slide bushing onto shaft with flange against
collar and lock bushing to shaft. Attach large pulley
to bushing by inserting the bolts back into the non-
threaded holes. Tighten equally until snug. Torque
bolts to 180 in-lbs.
10. Replace drive belts on pulleys.
11. Check pulley alignment with a straight edge and adjust
engine if needed. Check belt tension. Belt deflection
at the center of the belt should be 7/16" when a 20 lb.
load is placed against the belt. See Section 5.11 for
more information on adjusting belt tension.
5.13 HYDRAULIC FEED MAINTENANCE
12. Replace hydraulic pump belt. Readjust hydraulic
pump belt tension by sliding the hydraulic pump in
the mounting slots. Tighten bolts.
13. Check to make sure you knife to anvil gap is a 1/16"
to your closest blade and torque the anvil bolts to
75 ft-lbs.
14. Replace belt guides and belt guard and resume
operation.
15. Depress belt engagement pedal, start engine, engage
drive belt, and test unit. Readjust pulleys and belt
tension if needed.
