Check/Adjust Sprocket Timing; Adjusting Boom Level To Ground - Hardi Ranger 550 Instruction Book

6 - Maintenance

Check/adjust sprocket timing

1. Unfold the boom and stand on its rear side.
2. Check that the pin connection (A) in the timing chain is aligned
with the center line (B) between the sprocket. Note forward driving
direction (C) - adjustment is done at rearside of the boom. (A) is the
7th pin connection on the chain.
3. To adjust timing, loosen turnbuckles on the front and rear cables
until slack.
4. Line up the chain and sprocket as indicated in step 2 above.

Adjusting boom level to ground

Unfold the boom and check that the boom sections are parallel to the
center frame and level to the ground. Adjust if necessary, as described
below. Adjustment is carried out with the boom unfolded.
For SPB-HY/HV models the following procedure is used:
1. Loosen jam nut (A).
2. Adjust nut (B) - in or out - until boom wing is level to the ground.
3. Secure jam nut (A) again.
Same procedure applies to both sides.
For SPB-HZ models the following procedure is used:
1. Ensure that cylinder is fully extended.
2. Loosen jam nut (A).
3. Apply an adjustable wrench to the machined surface at (B).
4. Turn the cylinder rod until boom is level to the ground.
5. Secure jam nut (A) again.
Same procedure applies to both sides.
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