Service manual

A round wooden dowel works best for applying even pressure to seat the seal into the housing.

The smooth surface will face out toward you; the grooved side will face the housing toward

the motor end. Do not put grease or oil on the seal. Inspect the graphite section; make sure there are

no cracks or chips on the face of the black graphite or white ceramic. Slide this black part onto the motor

shaft (1.5” collar) and install the spring and retainer shield. The retainer shield is important, without it the

spring steel will cut into the impeller. Place the impeller on next. The keyway and slot should be free from

damage or distortion. If the shaft keyway slot is enlarged, the motor will need replacement. If the

impeller is also damaged in the key slot it must be replaced.

Important Note: The impeller “lock bolt” must be replaced as a new part each time the pump is

disassembled. Part #098-1613

9. When the pump assembly is placed back into the pump cover, properly seat the pump gasket (“o” ring)

and use some dishsoap to avoid pinching the o-ring.

1/3HP MOTOR REPLACEMENT (Rinse Pump)

Same as the Wash Pump except the motor shaft attaches to an auxiliary shaft. Motor shaft diameter is

5/8” and the auxiliary shaft w/seal is 3/4” instead of 7/8.” Impeller screws on right-hand threads instead of

a keyway and bolt. When setting up the auxiliary shaft, slide forward until it touches the pump cover, then

back off 1/8”. This pump has an open-face impeller.

1.5HP MOTOR REPLACEMENT on ADC-66 (Power Scrapper Pump)

Same as the Wash Pump except the motor shaft and seal are 5/8” diameter and the pump gasket is also

an “o” ring. Impeller screws on instead of a keyway and bolt. This motor, as it is used on the 66, is

always wire 220v, single phase. It is, however, the standard 1.5 hp ADS motor for low-temp machines.

This pump has an open-face impeller.

HI TEMP DESIGN IN CONVEYORS

The term “Hi Temp” refers to the sanitation process of the dishmachine. Or, in other words, the type of

process used to achieve an acceptable kill rate in bacteria. There are typically two methods, chemical or

thermal sanitizing. In high temperature sanitizing, the surface of the dishware must reach a temperature

of 165° F for a minimum of ten seconds. It is assumed that a minimum of 3600 HUE ensures adequate

sanitization. One second of 165° F corresponds to 346.8 HUE points (although 160° F only provides 91.9

points and 140° F only 1 point); this is an ascending scale, which tops out at 165° F. This is accomplished

by spraying 180° F water over the dishware during the ﬁ nal rinse. This elevates the surface

temperature to 165° F during 10 seconds, which temperature reduces organisms by 99.999%. HUE points

are also added for seconds spent in hot wash water but the value only reaches a few hundred points. This

is the Heat Unit Equivalent (H.U.E.) test required for NSF certiﬁ cation (Reference: Mallmann, A Study of

Mechanical Dishwashing, University of Michigan, 1947).

The ADC conveyors are rated in both methods of sanitizing, and NSF lists these dishmachines as dual

sanitizers. This means the machine design can serve in both roles without modiﬁ cation. The ﬁ nal rinse

manifold will accomplish the task of applying chemical sprays or high temperature sprays with the same

water consumption rates and systems. The only difference is in the type of chemical dispenser application

(min. 50 ppm chlorine) or the boosted incoming hot water (min. 180° F) for ﬁ nal rinse. (Reference: ANSI/

NSF Standard 3, 1996)