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MAINTENANCE
The MORTARMAN
750 is designed to require very low maintenance, however, following the few basic
®
maintenance procedures listed below will greatly reduce your machine's down time.
1. Clean themixer throughly after each use and do not allowmaterial to build up on any portion of themixer.
REMEMBER - Always unplug the mixer, or disconnect the spark plug wire before
performing any maintenance procedures.
2. Change the gearbox oil after the first 50 hours of operation, after that the oil should be changed every 250
hours. Changing the oil is a simple procedure, as the drain bolt and a sight window for the full levelmarking
are located on the gearbox body. Use a premium SAE 90 gearbox oil when making the change.
3. Check the drive belt tightness when the machine arrives from our factory.....maintain the belts at this
tension......taunt, yet not extremely tight. Caution, if the belts are overly tightened, damage can result to
themotor and the gearbox.
REMEMBER: drive belts experience themajority of strech during the first 15 hours of operation,monitor the
belts closely during break-in.
NOTE : NEVER touch or adjust the belts while the machine is operating
To tighten the belts the motor is moved forward, further away from the rear pulley. Make sure the two
adjusting bolts are tightened in equal amounts, as the motor's drive pulleymust stay in alignment
with the gearbox pulley. Should the belts continually come off the pulley, check the following:
- condition of the belts, are they worn out, are they the proper specification
- alignment of the drive pulley and gearbox pulley, are they in line
- are the pulleys themselves in good condition? ......not bent or clogged with debris.
NOTE : it is not advisable to replace just one belt,they need to be replaced in sets. This
is because a new belt needs a different degree of tightness than a used belt. It is always
a good idea to have a spare set of belts in your truck......replacement is straight forward
and simple.....be smart and be prepared!
4. The paddle assembly hardware should bemonitored and retightened the first 15 hours of operation.
After the components have seated in, it is still a good idea to check the paddle hardware on a weekly basis,
or whenever themachine is thoroughly cleaned.
Many contractors have found it very effective to have an additional set of paddles....when one set becomes
ready formaintenance, remove the entire paddle spider and drop on the spare.
This procedure takes less than one hour and allows the used set of paddles to be set aside andmaintained
at your leisure.
As the paddle wiper rubber wears it is important to bring the distance between the wiper rubber, and the
drum back to its original specification.......which is 5mm or 1/5".
DO NOT place the rubber flush against the drum....... this will cause the paddle to drag excessively and
can lead to the paddle bending or breaking.
NOTE : Should the paddles ever begin to emit sharp scraping sounds, or the paddle spider system begin to
vibrate heavily, stop the mixer. Disconnect all power and unload by hand if necessary. Do not restart the
machine until the cause of the malfunction has been ascertained.
BATTERY:
- Keep the battery clean and dry.
- Use a moist anti-static cloth only to wipe the battery, otherwise there is a danger of explosion.
- Do not open the battery.
- Recharge in case of insufficient starting power.
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