maintenance
7.Remove the three 3/8 – 16 x 3” bolts from the piston. Remove the front faceplate.
8.Install two the 3/8’ 16x3” bolts back into the piston – do not tighten. Use the two bolts as leverage to remove the rubber piston cup and rear components.
9.Obtain two 3/8 16x7” full thread studs (these studs will be used to assist in assembly alignment) insert the two studs into the piston adapter. Coat the concrete cylinder with grease.
10.Install the “O” Ring around the oiler plate. Install the plate into the concrete cylinder utilizing the studs for alignment.
NOTICE
Felt ring must be saturated with 30 wt. oil prior to installation.
11.Install the felt holder over the oiler plate. Install felt ring into felt holder. Install the bronze ring.
12.Using silicon sealant place a small bead of sealant material on the front of the rubber piston cup and the rear of the face plate. Install over alignment studs and into concrete cylinders.
13.Insert one 3/8” 16x3” bolt into the open bolt hole, remove the alignment studs one at a time and install the remaining 3/8” 16x3” bolts.
NOTICE
Before installing 3/8” bolts, coat the back of bolt heads with silicon sealant. Torque all three bolts equal at 55 ft. lbs. each.
Wear Plate And Cutting Ring Replacement
Due to the swinging motion of the
If the wear ring and wear plate do not fully seat against each other the concrete slurry will pump into the hopper. This condition can be easily observed by the sudden change of the level of concrete inside the hopper during each stroke.
1.Remove the two hydraulic hoses connected to the remix motor. Plug the ports with fittings (not provided) to prevent hydraulic hose leakage.
2.Remove the hopper discharge nipple and loosen sleeve seal. Inspect and replace if wear is excessive.
3.Remove the two tie rod nuts and the four eyebolt nuts securing the hopper to the pump frame.
4.Using an approved lifting device, remove the hopper using extreme care not to damage the hopper seal.
5.Remove the four 1/2”
6.Using two small pry bars remove the rubber energizer ring, steel insert ring and wear ring.
NOTICE
The energizer ring and wear ring will normally have concrete contamination holding them in position. It will be required to chip some of the concrete loose to better expose the energizer ring.
7.Clean out all concrete build up in and around the nun- plate area with a wire brush.
8.Inspect the wear components for indications of wear. The wear plate has two wear surfaces.
Wear Plate Installation
1.Install the two cylinder
2.Using silicon sealant, coat the circumference of the concrete cylinders, the back of the wear plate and around the five bolt holes. Next, install the wear plate and the five bolts.The bolts must all be equally snugged and tightened to 100 foot pounds each.
Wear Ring Installation
1.Install the wear ring into the nun plate.
2.Install the steel insert ring inside of the rubber energizer ring.
3.Install the energizer ring assembly into the nun plate.
4.After installing the above mentioned components the machine can be reassembled by reversing steps 1 through 5 of the Wear Plate and Cutting Ring Replacement Procedure.
page 50 — MAYCO LS600P CONCRETE PUMP • operation manual — rev. #0 (05/13/13)
