Echo CH8993H Owners Manual v.7 - Manual (Page 27)

23 8 INCH TURNTABLE CHIPPER
ENGLISH
SERVICE & MAINTENANCE
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.
WARNING
5.12 FILLING HYDRAULIC FLUID
Hydraulic pressure controlled by the relief valve is
factory set at 2500 PSI.
NOTE
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.
7. Loosen the four engine mount bolts and slide engine
towards chipper housing.
8. Remove the drive belt from the disk shaft pulley.
9. Remove the bolts attaching the pulley bushing to the
pulley.
10. Install the bushing push bolts and tighten alternately
one flat at a time to remove the bushing from the
pulley.
11. Remove the pulley and the pulley bushing.
12. Loosen the bearing spacer bolt and remove the bearing
spacer.
13. Loosen the two bearing set screws.
14. Remove four bearing mounting bolts and proximity
sensor bracket.
15. Remove bearing and install new bearing with grease
zerk facing engine.
16. Install the four bearing mounting bolts with washers
through the proximity sensor bracket, bearing, bearing
mount bracket and frame. Torque to 75 ft lb.
17. Tighten the two bearing set screws.
18. Install the bearing spacer tight against the bearing and
lock in place.
19. Adjust the proximity sensor to within 1/32” to 1/16” from
bearing spacer bolt head.
20. Place pulley bushing on shaft.
21. Place pulley on bushing.
22. Align pulley with engine pulley using a straight edge.
23. Alternately tighten bushing bolts 1 flat at a time.
24. Install drive belt on pulley.
25. Install large idle pulley if previously removed.
26. Lower engagement handle to engage drive belt.
27. Alternately turn each of the belt tension bolts clockwise
an equal number of turns until the belt deflection at the
center of the belt is 7/16” when a 20 lb load is placed
against the belt (figure 5.6)
28. Check pulley alignment using a straight edge and adjust
the appropriate belt tension screw if required.
29. Tighten the four engine mount bolts to the appropriate
torque.
30. Tighten engine tie bolt.
31. Verify blade to anvil clearance is 1/16 to 1/8” on all
blades.
32. Tilt access cover over disk.
33. Replace the two 3/8 inch retaining bolts holding
the access cover to the main frame assembly and
tighten.
Handle pressurized hydraulic fluid carefully. Escaping
pressurized hydraulic fluid may penetrate your skin
causing serious injury. This fluid may also be hot
enough to burn. Serious infection or reactions can
develop if immediate proper medical treatment is not
administered.
WARNING
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.
5. Run the feed roller in both directions for several minutes
until any remaining air purges from the unit. Refill the
reservoir as necessary.
6. Shut down the engine, check for and correct any
fluid leaks, and check the reservoir level. Add fluid
if necessary. The hydraulic pump is now ready for
operation.