MULTIQUIP MAYCO Series Operation Manual page 33

NOTICE
Make sure the eccentric lock is facing toward the
outside of the pumping unit.
9. Set crankshaft assembly into the pump box and align
both bearing assemblies with the pump box mountings.
10. After crankshaft assembly is securely fastened to the
pump box, place sprocket (P/N EM14307) onto the cam
side of the crankshaft assembly. Install bushing (P/N
EM14309) into sprocket. Align sprocket with sprocket
on countershafts and tighten bolts.
11. Install chain P/N EM14308. To adjust, loosen locknuts
on pusher bolts and tighten chain to approximately 1/2
in. slack in the chain. Once chain is adjusted properly,
tighten down locknuts.
BALL AND SEAT REPLACEMENT PROCEDURE
1. Remove 3"x 2" reducer and 3" elbow from the pump
outlet. Remove exhaust gate and Y-manifold (secondary
manifold). Check ball seat and ball stop pin for wear.
If any wear is detected, the part should be replaced.
Remove T-manifold (primary manifold). Check all parts
for wear. Remove hopper and hopper seat and inspect.
2. Loosen the piston nuts and remove the piston cup
assembly and cylinders. Inspect all parts for wear and
replace parts with excessive wear. Check oiler pump
for proper operation.
3. Clean all parts thoroughly, removing all foreign material
and concrete slurry. Once parts are clean, install
concrete cylinders. Place oiler plate O-ring in place
and coat with oil. Install small O-ring on piston rod. Run
oiler line through the cylinders and connect in the oiler
fitting on the oiler plate.
4. Push oiler plate into cylinder. Install ring and felt holder,
soak felt ring in oil, then install around felt holder in
cylinder. Make sure the bronze ring is flat, then push
it up flush with the ring and felt holder.
5. Coat piston cup with oil and push it into the cylinder.
Install bushing into center of piston cup. Put small
O-ring on rod, place face plate on rod and tighten down
securely. Repeat these procedure on the opposite
cylinder.
6. Thoroughly check T-manifold, ball stoppings and
both steel balls for wear. Insert an O-ring in the top
MAYCO C30HDGA CONCRETE PUMP • OPERATION MANUAL — REV. #1 (09/09/19) — PAGE 33
flange and in the leading edge of the manifold. Put the
manifold onto the primary side of the pump and install
bolts leaving them loose.
7. Check Y-manifold for wear, install all O-rings, ball
stop pin, ball and seat. Align and install Y-manifold to
T-manifold and cylinder assembly. Tighten Y-manifold
bolts first before tightening T-manifold bolts. After
manifolds are tight, check O-rings for slippage.
8. Insert seat into frame hole directly above the T-manifold.
The seat orifice should fit inside the frame itself, then
the seat sits on top of the orifice. On the dura-seat,
set the big end of the seat in the frame. The seat, or
the small part of the dura-seat, fits into the bottom of
the hopper.
9. After tightening the manifold bolts and inserting the
seats in place, set the hopper over the seat and align
the bolt holes. Tighten bolts, check O-ring and seat
for alignment.
10. Check exhaust gate for wear, install and align gate onto
Y-manifold. Insert O-ring into exhaust gate flange and
close gate. Lock down lever and adjust clamp arm.
11. Install 3 in. elbow and 3x 2 in. reducer. Fill hopper half
full and check for leaks.
MAINTENANCE