SealMaster MasterMix Bulk, Owner'S Manual

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15
MACHINE MAINTENANCE
TROUBLESHOOTING GUIDE
1. ENGINE

Refer to the engine owner’s manual for all specifications and
operating instructions.

Always move the fuel shutoff valve to the off position when finished.
Fuel can migrate down into the oil crankcase if the valve is left open. If
an electric motor is used, move the disconnect lever to the off
position.
2. MATERIAL PUMP

Material flow is reduced. The Basket Strainer or plumbing leading to
the pump is partially plugged. Or the pump could be worn internally
and needs new check balls and ball seats or replaced. Also, check the
rotation speed of the pump and hydraulic motor. Should the pump be
rotating slower than normal, the hydraulic motor and hydraulic pump
need to be tested for wear. Roper and Bowie Pumps could have worn
gears and also the center case. Before removing them for testing,
there is an adjustment that can be tried. On the side of the fwd.-rev
control valve, is a tiny plug that takes an Allen wrench, remove this
plug and there is an Allen head adjustment screw. Turn this clockwise
one full turn. If this doesn’t solve the problem then the hydraulic
pump and motor need testing or replacing.

The hydraulic motor turns but the pump doesn’t. Inspect the coupler
for wear or possibly a sheared key either on the pump shaft or
hydraulic motor shaft.

Material leaks from around the pump shaft. A Roper pump has
packing around the shaft. Remove the two nuts that are on either side
of the pump shaft and then remove the two-piece packing gland. The
gland will look like it is broken, ignore this as it is a casting that has
been snapped in half. Purchase Roper pump packing and add the
packing rings until the cavity is full. Replace the gland and snug the
nuts down. Do not overtighten as the shaft can be damaged. If the
pump will have to be disassembled to replace the ring seals.