Driving Mechanism - Primus MB 90 Installation And Maintenance Manual

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QUANTITY OF LUBRICANT:
Monthly:
Sealing (left + right) = 10 g + 10 g
Bearing (left + right) = 10 g + 10 g
The motor bearings are maintenance-free (do not lubricate).

5.9. DRIVING MECHANISM

On a new machine and after a belt replacement, make an inspection of the belt tightness:
1. After first 24 hrs of operation
2. After first 80 hrs of operation
3. Every 6 months or every 1000 operation hours - which ever come first.
INSPECTION OF THE BELT TIGHTNESS
WARNING !
!
BEFORE YOU START, TURN OFF THE MAIN SWITCH TO AVOID POSSIBLE INJURIES!
The belts are accessible after the side cover dismantling. If the belts are too tight the bearing seatings are
under stress and their life service has been shortened. If the belts are too loose they can be slipping on the
pulley and cause a noisy operation. In the case of need, tighten the belts. Change the belts if worn out or
damaged. In table 5.9. is indicated testing force of belt tensioning which can be measured by tension meter.
Procedure for approximate belt tensioning with belt deflection 6,1 mm apply a load of 2,5 kg to the middle
of the belt.
Force F measured by device
BELT REPLACEMENT
NEVER USE A CROWBAR TO TAKE OFF THE BELTS OVER THE PULLEY GROOVES.
Loosen the bolts which fix the motor and loosen adjusting screw for taking the belts off.
Always change a complete set of the belts for one transmission. Always the same type of the changed belts
in the set is required. If the pulleys are damaged, replace them.
After the belt replacement, check the pulley alignment, the tightness of belts, bolts and nuts.
Keep the belts and pulleys clean and free of oil, lubricants, water etc.
PULLEY ALIGNMENT
A precondition for the reliable operation and long service life of the belts is a proper pulley alignment. Do the
inspection of the alignment by means of a ruler, fig.5.9. pos.4 with placing it on the pulley faces. If all points
(A, B, C, D) are touching the ruler the pulleys are aligned. In other case the pulleys must be aligned.
3. Main housing with the pulley
1. Drum
2. Drive motor
3. Ruler
22
Fig.5.8. Lubrications points
90 kg / 198lb
475 N
Tab. 5.9.
INSTALLATION AND MAINTENANCE MANUAL
140 kg / 308 lb, 180 kg / 396 lb
463 N
Fig.5.9.
PUBLICATION DATE 07/04
523 N
513289