Bleed Wing-Fold Hydraulic Systems-Narrow And Medium Machines

IMPORTANT: Follow bleed procedure EXACTLY as shown. Hydraulic reservoir MUST be filled prior to bleeding and kept FULL throughout entire bleed procedure.

IMPORTANT: If performing bleed procedure on machines running different than 1800 rpm, bleed rate times MUST be adjusted to a 113 Lpm (30 gpm) per minute rate. Example: If tractor is running at 57 Lpm (15 gpm), then double all bleed times.

CAUTION: Insure cylinders are supported firmly with wood block before bleeding cylinders. Wire could also be used to retain wheel module cylinders. Failure to do this may result in cylinder falling and causing serious injury to you or others.

1. Remove pins from rod end. Make sure cylinders are properly supported.

2. Verify 7-pin warning light harness is plugged into tractor.

3. Verify tractor is full of hydraulic oil.

4. Run tractor to 1800 rpm.

5. Fully extend and retract all cylinders at least two times, maintaining hydraulic pressure at full extension for at least 30 seconds.

6. Extend cylinders one more time, maintaining pressure at full extension for one minute.

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A-Rod End

B-Swing Arms

C-Drilled Pin 1-1/4 x 7.18 in.

D-Washer, 0.149 x 1-5/16 x 2-1/2 in. (2 Used)

IMPORTANT: If an oil leak is found during bleed procedure, stop oil leak then restart procedure.

8. Extend cylinders and keep in continuous flow for 2 minutes.

9. CONDUCT STATIC LEAK TEST-

a. Lower machine so sweeps or harrow tines are 50 mm (2 in.) off ground.

b. Disconnect all hydraulic hoses from tractor.

c. Measure cylinder rod lengths, then wait one hour and recheck measurements.

• If cylinder rod measurements are LESS than 6.3 mm (1/4 in.)-Machine OK.
• If cylinder rod measurements are MORE than 6.3 mm (1/4 in.)-Repeat complete bleed procedure.

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