Multiquip STH - Manual (Page 17)

STH-10 FT. • RIDE-ON POWER TROWEL — PARTS & OPERATION MANUAL — REV. #5 (06/08/05) — PAGE 17
NOTE
See the engine manual supplied with your machine for
appropriate engine maintenance schedule and troubleshooting
guide for problems.
At the front of the book (Page B) there is a “Daily Pre-Operation
Checklist”. Make copies of this checklist and use it on a daily
basis.
CAUTION! CAUTION! CAUTION! CAUTION! CAUTION!
Disconnect spark plug wires and battery cables before
attempting any service or maintenance on the ride-on trowel.
MAINTENANCE SCHEDULE
Daily (8-10 Hours)
1. Check the fluid levels in the engine and reservoir, fill as
necessary.
Weekly (30-40 Hours)
1. Relube arms, thrust collar and clutch
2. Replace blades if necessary.
3. Check and clean or replace the engine air filter as
necessary.
4. Replace engine oil and filter as necessary, see engine
manual.
Monthly (100-125 Hours)
1. Remove, clean, reinstall and relube the arms and thrust
collar. Adjust the blade arms.
Yearly (500-600 Hours)
1. Check and replace if necessary the arm bushings, and
thrust collar bushings.
2. Check pitch control cables for wear.
3. Adjust blade speed.
4. Replace hydraulic fluid and hydraulic filters.
NOTE
After the first 200 hours, replace the hydraulic filter cartridges .
MAINTENANCE PROCEDURES
Checking/Adjusting Blade Speed
Because the two hydraulic drive motors operate independent of
each other, the blade speed between them may vary. If the unit’s
steering is difficult to control, the blade speeds may need to be
checked, or if one spider is spinning noticeably faster or slower
than the other, the blade speed may need to be checked. It is
also recommended that the blade speed be checked at least
once a year.
Blade speed adjustment is a two-step process. First, the left
spider’s speed should be checked and/or adjusted. Second,
the right spider’s speed should be adjusted to match the left.
Left Spider Speed Adjustment
The left spider’s speed is adjusted by changing the length of
the rod end spacing (Figure 15) at the front of the foot pedal.
Lengthening the spacing increases the blade speed; shortening
the spacing decreases the blade speed.
STH-55JD-TC — MAINTENANCE
Right Spider Speed Adjustment
The right spider’s speed is adjusted by changing the length of
the connecting rod on the pump actuation levers (Figure 16,
Page 17). This rod is basically a turnbuckle. Rotating it in one
direction increases the length and corresponding spider speed.
Rotating it the opposite direction decreases the length and
spider speed. The right spider’s speed should be within 3 rpm
of the left.
A good starting point in the adjustment process is to adjust the
rod such that both spiders begin to rotate at the same time
when the foot pedal is slowly depressed. This will, generally,
get the speeds close enough for use if instrumentation is
unavailable (i.e. on the job site). From this point on, some form of
instrumentation is required to verify that the right spider speed is
within the tolerance specified above. A strobe or magnetic pickup
type speed indicator is recommended to verify the speeds.
The speeds should be adjusted on a dry concrete floor with the
blades pitched flat. The blade speed should be set at 125-130
rpm with the engine at full speed.
Matching Blade Pitch for Both Sets of Blades
Figure 15. Blade Speed Control Foot Pedal