Yazoo/Kees ZMKW52212 User Manual

English

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39

MAINTENANCE

Check oil level in tank daily. Oil level should be ¾" to 

1" below the top of the tank. Check all fittings, hoses 

and lines for damage or leaks. Replace or repair any 

questionable lines or fittings. 
Change the oil and filter after the first 250 hours of 

operation then annually after that. Drain tank and 

remove filter, be sure to clean around the tank and filter 

head before removal. Replace filter and drain plug and 

refill hydraulic tank. Only use MOBIL 1 synthetic oil. 
Raise and block up the rear of the machine so the drive 

wheels can rotate freely. Start the engine at the lowest 

RPM possible, move the motion control levers forward 

and run machine for several minutes. Stop engine and 

recheck the oil level.
If the wheels do not respond an air lock has occurred 

within the system. The system must be bled off of air 

or let the machine set overnight to allow the air time to 

dissipate out of the oil. DO NOT run the machine with 

an air lock serious damage can occur to the pumps 

and wheel motors.

Inspect blades and sharpen or replace as needed. 

Check blades daily or as needed. Bent, cracked or 

blades with large notches in them should be replaced. 

Sharpen to an angle of 22 to 28 degrees. Always check 

the balance of the blades after sharpening to prevent 

excessive vibration.
Checking the Blades
In order to attain the best mowing performance, it is 

important that the blades are well sharpened and not 

damaged. 
Bent or cracked blades or blades with large nicks 

should be replaced. 
Check the blade mounts.
Damaged blades should be replaced after hitting 

obstacles that result in a breakdown. Let the service 

workshop decide whether the blade can be repaired/

ground or must be discarded.
Blade replacement
Remove blade bolt by turning counterclockwise.
Install new or resharpened blade with stamped 

“GRASS SIDE” facing towards ground/grass (down) or 

“THIS SIDE UP” facing deck and cutter housing.
Some blades may not be stamped with “GRASS SIDE” 

and “THIS SIDE UP”. These blades can be installed 

either way.
Install and tighten blade bolt securely. Torque blade 

bolt to 90 ft/ lbs (122 Nm).