Multiquip LS-300 - Manual (Page 39)

MAYCO LS300 CONCRETE PUMP • OPERATION AND PARTS MANUAL — REV. #4 (06/21/10) — PAGE 39
CLEANING THE LUBRICATION BOX
1. Remove the top cover and the drain plug (Figure 40)
located at the bottom of the box and fully drain the inside
of the box.
2. Once the box is drained, start the engine and stroke the
cylinder ( keep hands out of box) ten to fifteen times.
3. While stroking, spray water inside of the box to
thoroughly clean out all contamination (Figure 40).
4. When the box is clean replace drain plug, add new
lubrication and install the top cover.
1. The lubrication level should be checked everyday prior
to pumping and maintained at a height of 5 inches or
about ½ the concrete cylinder height. We recommend a
using a 30 weight motor oil.
CYLINDER LUBRICATION BOX
Figure 40. Cleaning the Lubrication Box
MAINTENANCE (PUMP)
ACCUMULATOR CIRCUIT
Figure 41. Accumulator
Before checking lubrication level, stop the engine and
remove the engine starter key.
2. As the rubber piston cups naturally wear, fine cement
particles will accumulate in the box. Once the concrete
paste reaches a height of about ½ inch from the bottom
of the box, drain and clean the lubrication box.
Improper accumulator charging can result in an explosion
causing serious injury or death! NEVER use oxygen or
compressed air to charge the accumulator! Only qualified
personal should perform this procedure. Use only
dry
nitrogen to charge the
accumulator. Contact your
Mayco service department
or your local Parker
representative for proper
charging procedure.
The accumulator circuit stores oil under pressure and releases
it to the pilot value to ensure enough pressure is provided to
operate the valve.
The accumulator circuit is equipped with a piston type
accumulator (Figure 41) pre-charged at the factory with 500 PSI
of dry nitrogen.
CAUTION - SAFETY GUIDELINES
DANGER - ACCUMULATOR CHARGING
When using the pump during freezing conditions,
completely drain the water box and cover the hopper
after pumping. Frozen liquid will restrict the piston travel
and cause
severe damage to the pump.
WARNING - FREEZING CONDITIONS