MULTIQUIP MAYCO Series Operation Manual page 32

5. Take a sponge (2"x 4"x 6") and soak it with water. Take
the hose that is disconnected from the pump and shake
out the concrete so that about 2 feet of it is clear. Insert
the sponge into the hose.
6. Reconnect the hose to the pump. Fill the hopper
with water and resume pumping. Run the pump
approximately half throttle. The sponge will be
discharged at the end of the line followed by clear water.
At this point, the pump and lines will be completely
clean and ready for the next job.
7. Repeat steps 1 through 6 a few times to ensure that
the hose lines are thoroughly cleaned.
LUBRICATION BOX
The C30HDGA features a fully enclosed lubrication box,
which utilizes the "SPLASH" method of lubrication.
Visually inspect the oil in the lubrication box (Figure 11)
by making sure the oil is at the correct operating level as
indicated by the dip stick. Also reference the oil level decal
(Figure 12) adjacent to the lubrication box.
NOTICE
Make sure the pump is on a secure level surface when
checking the oil level inside the lubrication box.
NOTICE
The oil level must be checked daily to ensure adequate
oil level and oil cleanliness.
PISTON CUP WEAR
The rubber piston cups are a natural wear component and
will require periodic replacement. The life of the rubber cups
depends on many factors, proper oil level, oil cleanliness,
abrasiveness of aggregate being pumped and material
slump etc.
As the rubber piston cups wear, fine cement particles will
accumulate in the bottom of the lubrication box. Once this
cement paste reaches 1-inch in height, it is recommended
that the lubrication box be drained (flushed) and cleaned
and the oil replaced with new SAE 30 motor oil.
PAGE 32 — MAYCO C30HDGA CONCRETE PUMP • OPERATION MANUAL — REV. #1 (09/09/19)
NOTICE
IMPORTANT! To ensure maximum cup life, the oil level
in the lubrication box must be maintained at the proper
level. In addition the lubrication box must be cleaned
periodically.
NOTICE
There are two clean-out ports located at the bottom of
the lubrication box.
CRANKSHAFT AND CAM ASSEMBLY PROCEDURE
1. Set bearing block (P/N EM14303) into hydraulic press.
Place bearing cup into bearing block and press in
evenly. Bearing cup should be aligned equally on both
sides of bearing block.
2. Set crankshaft into hydraulic press with the long end
towards the top. Install spacer (P/N EM14322), O-ring
(P/N EM14326) and bearing cone (P/N EM14325) onto
crankshaft. Place bearing block on crankshaft until the
bearing cone is riding in the bearing cup.
3. Insert bearing cone spacer (P/N EM14323) onto
crankshaft and inside bearing block. Install second
bearing cone until it is seated inside bearing cup.
4. Place O-ring and spacer (P/N EM14302) on crankshaft.
Set cam weldment on top of spacer. Install crankshaft
key and cam key on cam bushing (P/N EM14301).
5. Slide cam bushing down crankshaft and align the
bushing, cam and crankshaft. Install sleeve over
crankshaft and align with hydraulic press. Install cam
bushing bolts loosely. Press bushing down onto bearing
assembly. Leaving pressure on the bushing, tighten
cam bolts evenly to 40-50 foot pounds.
6. Release pressure on the bushing, reapply pressure to
bushing and tighten bolts evenly to 40-50 foot pounds.
Repeat procedure 3 to 4 times.
7. After bushing has been fitted tightly into cam, remove
from hydraulic press. Remove one bolt at a time, using
Loctite, install bolts and torque to 65-70 foot pounds.
Counter sink set screw hole and install dog point set
screw and second set screw both with LoctiteTM.
8. Place cam bearing onto crankshaft keeping bearing
loose.
MAINTENANCE