Service manual

MOTORS

It is recommended that pump motors be replaced as a unit. This is classiﬁ ed as “pump motor complete,

less cover.” The reasoning is as follows: conveyors are generally placed in high volume accounts, which

have little space or time for major repairs. The simplest procedure is to remove the four housing bolts,

disconnected the electrical connection and replace with a new unit. This can be accomplished without

extensive service knowledge and down time for the restaurant. If there is a problem with the seal, shaft, or

impeller the resulting time investment could cause disruption.

The performance proﬁ le of conveyors, meaning maintenance items are usually left undone, tend to

produce service events of major proportion. This problem can best be managed by a little preparation.

The primary events include conveyor gearbox, heater/circuit breaker, wash/rinse pumps, and damaged or

broken parts. Any of these assemblies can be replaced and operations returned to normal within 30 min-

utes if the assemblies are readily available. ADS has kits or lists of major items and they can be

purchased in assembled form.

Once a replacement is speedily made, the faulty part can be returned to the shop. At the shop there is

enough time and resources to effect an adequate repair; the repaired part then becomes the

replacement assembly for the next event. This is the fastest way to service the high volume conveyor

business. Expecting service people to repair assemblies can place an account in a down condition. It can

lead to multiple-day events. All necessary resources are simply not available at the restaurant and

overnighting unexpected parts can add days before they are up again. So assemblies are recommended

for key areas such as conveyor drives, pump assemblies, and plumbing manifolds.

3HP MOTOR REPLACEMENT (Wash Pump)

SEAL REPLACEMENT PROCEDURE

1. Turn off power to the machine. Tag-out power to the machine. Empty water from the wash tank and

open petcock on wash pump motor.

2. Remove the two mounting bolts that secure motor to frame.

3. Take out the four 3/8” bolts that hold rear pump housing to the front pump cover.

4. Slide motor and rear pump housing out of the pump cover. Place the unit on the ﬂ oor and open the rear

access plate on the motor.

5. Disconnect the three lead wires that are attached to terminals L1, L2, and L3. Remove the conduit from

the motor.

6. Remove the impeller by taking out the secure bolt. The impeller slides off the keyway. If it does not

slide off easily, gently tap it from behind. Heavy blows from a hammer will damage the impeller and shaft

alignment.

7. Remove the four 3/8” bolts that hold the rear pump housing to the motor.

Carefully slide the housing off the motor; paying particular attention to the shaft seal. The graphite

section (black face) is the part that slides on the 1.5” dia. collar that slides over the 7/8” dia. motor shaft.

The ceramic section (white race) is the part that seats in the housing. Slide the graphite section off. Be

careful not to crack the ceramic when the pump housing is removed from the motor.

8. To assemble, reverse the order above. If you are replacing the seal make sure the rubber boot and

ceramic (white) are fully seated at the bottom of the pump housing. If the ceramic uses an “O” ring

instead of a boot, the operation is still the same. Seat the ceramic all the way in the housing. Make sure

the shaft is clean. Put the boot and ceramic section in the housing ﬁ rst. It will be helpful to use some

hand soap or dishsoap to slide the boot with the white ceramic section into the pump housing.