Bush Hog GHM 900 Section Maintenance, Unhitching from Tractor and Storage, Maintenance Check List

3-7 CUTTER BAR HELPER SPRING ADJUSTMENT (9’ MODELS ONLY)

The 9’ models are equipped with a helper spring assembly to transfer cutter bar weight from the outer end of the cutter bar back to the frame assembly. The recommended minimum adjustment measurement is 5-1/2” from under the bolt head to the end of the rod weldment nut. (Figure 3-5) To transfer more weight, shorten the measurement. To transfer less weight, lengthen the measurement. Be advised, the shorter the measurement, the less the outer end of the cutter bar can reach down.

3-8 UNHITCHING FROM TRACTOR AND STORAGE

To prevent rust, always clean all debris from mower after use. Store in a clean, dry place preferably with a hard, level floor. Clean and paint any areas where paint is missing. Apply a light coat of grease to cylin- der rod..

Unhitch mower as follows:

A. Pin parking stand in the down position as shown in Figure 3-6.

B. Unfold cutter bar and lower to ground.

C. Lower 3-point hitch to rest on parking stand. Make certain all pressure is relieved from cutter bar cylinder.

D. Disconnect PTO driveline, hydraulic hose, and 3-point links.

WARNING

TO AVOID SERIOUS INJURY OR DEATH: ALWAYS STORE MOWER WITH THE CUTTER BAR IN THE UNFOLDED (HORIZONTAL) POSITION.

Figure 3-5 Helper Spring Assembly

Figure 3-6 Parking Stand

SECTION IV

MAINTENANCE

4-1 MAINTENANCE CHECK LIST

Perform scheduled maintenance as outlined below. Lower implement to ground, turn off tractor, and set parking brake before doing maintenance inspections or work. Some checks may require raising machine off ground and supporting with blocks. All bolts should be torqued as indicated in torque at end of manual unless otherwise indicated.

WARNING

THE MOWER CAN FALL FROM HYDRAULIC SYSTEM FAILURE. TO AVOID SERIOUS INJURY OR DEATH, SECURELY SUPPORT MOWER BEFORE WORKING UNDERNEATH.

BEFORE EACH USE

1.Perform LUBRICATION per paragraph 4-2.

2.Check blades and spindles to be sure that no foreign objects such as wire or steel strapping bands are wrapped around them.

3.Inspect blades for wear. Replace if necessary per paragraph 4-3. Always replace both blades with two blades equal in weight. Use only genuine Bush Hog replacement parts.

4.Check blade bolts for tightness. Tighten to 50 ft./lbs.

5.Make certain all shields are in place and in good condition. Repair or replace any missing or dam- aged shields.

6.Check tractor tire air pressure. Refer to tractor oper- ator’s manual.

7.During operation, listen for abnormal sounds which might indicate loose parts, damaged bearings, or other damage. Correct any deficiency before contin- uing operation.

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