42 - FORM NO. 56043056 ConvertaMAX™ 20/26 / BA 550/650
WHEEL DRIVE SYSTEM
CHAIN MAINTENANCE
•
Every two months check the chain tension, 1/2 inch (13mm) deflection at mid point.
•
Once a month check chain for binding and dryness, apply oil to lube the chain links.
•
Yearly remove chain, clean and re-oil.
CHAIN REMOVAL AND ADJUSTMENT
Chain Removal:
WARNING!
Disconnect a battery cable at the battery pack before servicing.
1
See Figure 4. Loosen the Lock Nut (A) and back out Bolt (B) several turns to loosen the drive chain tension.
2
Remove the retainer clip from the chain’s master link, separate and remove the chain from the sprockets.
3
To re-install chain loosen the (3) (C) drive motor mount screws and push the drive motor all the way forward. Note: The reason for this step is to shorten
the distance between the sprockets to make it easier to reconnect the master link.
4
Install a new chain and reconnect the master link and tension chain. Service Tip: Attach a cable tie strap to the end of the chain to help guide it between
the sprockets.
Adjustment:
1
Loosen the (3) motor mount Bolts (C) and the adjustment Lock Nut (A) to adjust chain tension.
2
Turn the Adjustment Bolt (B) in (CW) to obtain a 1/2 inch (13mm) chain deflection between the sprockets when moderate pressure is applied to the chain.
3
Tighten the adjustment bolt lock nut, the (3) motor mount bolts and test the drive system for proper operation.
WHEEL DRIVE MOTOR REMOVAL
1
Drain both the recovery and solution tanks, disconnect and remove the batteries and squeegee.
2
Remove the scrub brush head (follow steps in the Scrub Brush System section) from the machine. Then tip the machine on its right side.
3
Disconnect the drive motor wiring connector.
4
See Figure 4. Loosen the Lock Nut (A) and back out Bolt (B) several turns to loosen the drive chain tension.
5
Remove the retainer clip from the chains master link, separate and remove the chain from the sprockets.
6
Remove both the Setscrews (D) from the Drive Motor Sprocket (E) then remove the sprocket from the motor shaft.
7
Support the Drive Motor (F) then remove the (3) motor mount Bolts (C) and remove the motor and Chain Tension Bracket (G) from the machine.
8
Follow steps 1-7 in reverse order to reassemble, then refer to the
Chain Adjustment
section to retension the chain.
DRIVE WHEEL REMOVAL
1
Remove the scrub brush(es) and squeegee tool from the machine.
2
Press the brush head raise/lower foot pedal all the way forward and also to the left to place the brush head in its maximum service height position.
WARNING!
Never work under machine without safety stands or blocking to support the machine.
3
Block caster wheels and jack front of machine too where the drive wheel is 1-1/2 inches (38mm) off the floor. Service Tip: Place a small automotive type
scissors or bottle jack underneath the scrub brush deck in the middle being careful not to damage solution fittings.
4
Remove the drive chain (follow instructions in the
Chain Removal
manual section).
5
See Figure 4. Use a 10mm socket and wrench to remove the Hex Screws (H) and Nuts (I) that secure the Axle Retainer Bar (J) to the machine frame. Then
slide the axle bar off the end of the Axle (K) to remove.
6
Pull the drive wheel assembly forward to remove the left side axle end from its side frame-mounting hole. Then maneuver the wheel assembly out from
underneath the machine.
7
Follow steps 1-6 in reverse order to reassemble, then refer to the
Chain Adjustment
section to retension the chain.
8
Test-drive the machine for proper operation.
revised 9/01
