4-4 BLADE HOLDER REMOVAL (Fig. 4-3)
WARNING
THE CUTTER CAN FALL FROM HYDRAULIC SYSTEM FAILURE. TO AVOID SERIOUS INJURY OR DEATH, SECURELY SUPPORT CUTTER BEFORE WORKING UNDERNEATH.
NOTE
The spindle is a straight splined shaft, not a tapered shaft. Do not hit on end of spindle shaft as this will damage spindle assembly.
A. Remove cotter pin and castle nut.
B. Pull blade holder off shaft. It may be necessary to remove blades and pan, then remove blade hold- er with gear puller.
Figure
Chain
Guard
Assembly
Lower Shaft Nut
4-5 BLADE HOLDER INSTALLATION
A. If blades were removed, perform steps “C” and “D” in paragraph
B. Assemble blade holder and castle nut onto spindle shaft. Tighten nut to 300 ft./lbs. (406 Nm).
C. Insert cotter pin.
4-6 BLADE REPLACEMENT
WARNING
THE CUTTER CAN FALL FROM HYDRAULIC SYSTEM FAILURE. TO AVOID SERIOUS INJURY OR DEATH, SECURELY SUPPORT CUTTER BEFORE WORKING UNDERNEATH.
It is not necessary to remove the complete blade holder assembly to replace the blades. Blade bolts are accessible through a hole in the top of the cutter deck. Blades should only be replaced in matched pairs. Use only genuine Bush Hog replacements parts.
A. Remove nuts from blade bolts.
B. Inspect blade bolt shoulder for wear. Replace if necessary.
C. Assemble new blades and pan to blade holder using blade bolts, nuts and lockwashers. Tighten
nuts to 450 ft./lbs. (610 Nm).
D. Check to be sure that blades will swing freely. If blades will not swing freely, remove, locate prob- lem, and repair. Operating cutter when blades will not swing freely will cause excessive stress and vibration causing damage to implement.
4-7 CABLE ADJUSTMENT
A. Extend slide cylinder completely. Assure full extension by measuring from center of mounting pin to center of opposite mounting pin. Measurement should be
B. Put slack into cables by loosening eye bolts (if necessary).
C. Position counterweight box 1 inch (25.4 mm) from hydraulic tank.
D. Tighten eye bolts until slack is taken out of cables.
4-8 ADJUSTING HYDRAULIC PRESSURE
The hydraulic pressure for the cast iron system is preset from the factory at 3200 psi. If a hydraulic pressure adjustment is necessary, contact your authorized Bush Hog dealer.
WARNING
DO NOT ATTEMPT TO ADJUST HYDRAULIC SYSTEM PRESSURE. AN INCORRECT ADJUSTMENT COULD CREATE EXTREMELY HIGH PRESSURES RESULTING IN PERSON- AL INJURY AND EQUIPMENT DAMAGE.
4-9 CHANGING BLADE ROTATION
(Fig.
To change the direction of blade rotation perform the following procedures:
WARNING
DO NOT OPERATE CUTTER WITH COUNTERCLOCKWISE BLADE ROTATION UNLESS CUTTER DECK IS EQUIPPED WITH SAFETY CHAINS AND THE OPERATOR WEARS SAFETY GLASSES AND SAFETY (HARD) HAT. SAFETY CHAINS WILL REDUCE AMOUNT OF DEBRIS THROWN TOWARD OPERATOR. IT IS HIGHLY RECOMMENDED THAT OPERATOR BE PRO- TECTED WITH ROLLOVER PROTECTIVE SYSTEM (ROPS) ENCLOSED CAB AND THAT SEAT BELT BE USED FOR ALL MOWING OPERATIONS.
A. Remove hydraulic pressure and return lines from connections on motor.
B. Remove hydraulic fittings from both sides of motor.
C. Remove bolts retaining motor to spindle hous- ing.
13
