MacDon 742 HAY CONDITIONER - Manual (Page 78)

Form # 46290 Issue 09/05 76
MAINTENANCE/SERVICE
HAY CONDITIONER
Hay Conditioner Drive Chain Lubrication
Lubricate chain daily with lightweight oil (SAE 30).
Hay Conditioner Drive Chain Tension
Check hay conditioner drive chain tension after the
first 2 hours operation and every 100 hours
thereafter.
To check chain tension: Place a straightedge
across idler sprockets as shown. Light pressure at
mid-span should produce 5/8 in. (15 mm)
deflection.
If adjustment is required:
1. Loosen nut (A).
2. Back off nut (D) and turn nut (E) to push
sprocket rearward to increase tension to above
specification. Do not over-tighten.
3. Tighten nuts (A) and (D) to secure the position.
Hay Conditioner Roll Timing
Rolls must be timed to prevent contact between
bars. Bars of one roll must be approximately
centered between bars of the other roll as
illustrated.
When installing roll drive chain:
1. Rotate rolls to approximately correct timing.
2. Install chain.
3. Set roll timing as follows:
• Loosen four nuts (A) at upper roll sprocket.
• Rotate sprocket to achieve best roll timing.
• Tighten nuts (A) to secure the position.
Hay Conditioner Pulley Clean-Out Bolts
When installing hay conditioner drive belt, ensure
mounting bracket (B) for clean-out bolts on lower
roll driven pulley is not interfering with belt travel.
Also, ensure clean-out bolts are centered in pulley
grooves. Mounting bracket can be adjusted
laterally to properly position bolts.
A
D
E
CONDITIONER DRIVE CHAIN TENSION
B
A
ROLL TIMING ADJUSTMENT