Middleby Marshall PS570 Appendix - Service Bulletin MM-189 - New Conveyor Gear Motors, Subject

SECTION 3 - SERVICING COMPONENTS

Appendix - Service Bulletin MM-189 - New Conveyor Gear Motors,

Brushes, and Pickup Clamps, 8/01

Bulletin No. MM-189

Date: 8/24/01

Middleby Cooking Systems Group

1400 Toastmaster Drive • Elgin, IL 60120-9272 U. S. A. • Telephone: (847)741-3300 • Service and Parts Fax: (847)741-4406

Service Bulletin

SUBJECT

New conveyor gear motors, brushes, and pickup clamps for Middleby Marshall ovens

GENERAL

The conveyor gear motors used on all Middleby Marshall ovens (except model PS536) have been redesigned by the vendor. Changes to the motors include:

•A smaller-diameter motor casing.

•New motor brushes.

-Old-style motors continue to use brush P/Ns 22450-0052or 22450-0230as shown in the table below.

-All of the new motors use brush P/N 46658.

•A shorter clamp to attach the pickup assembly. This accommodates the smaller diameter of the motor.

-The pickup assembly with the original clamp is still available as P/N 27170-0263. This kit is only available in limited quantities. After our stock of the old-style pickup assembly kit is exhausted, you will need to save the existing clamp to attach a new pickup assembly to an old-style motor.

-The pickup assembly with the new, shorter clamp is available as P/N 46451.

-All of the new motors will be shipped in a kit that also includes the new clamp. This allows you to attach an existing pickup assembly to a new motor.

-In 7/01 and 8/01, some of the new motors were shipped under the part numbers of the old motors. These parts shipped without the new clamp. In most of these cases, you can tighten the existing clamp to fit the new motor. Some older clamps, however, cannot be tightened enough to fit. To be sure that you can install the new motor in all ovens, you should add the new clamp, P/N 46602, to your required parts stocking list, and carry a few spare clamps on each service vehicle.

Please be aware of these changes as you order your stocking parts. Some versions of the old motor, as well as the old- style pickup assembly, are still available in limited quantities. The brush for the old motor (P/N 22450-0052) will remain available in order to maintain motors already in the field.

		Old	Old	Old	New	New	New	New
Ratio	Used on	Motor	Brush	Pickup	Motor*	Brush	Pickup	Clamp
1400:1	PS310	27384-0008	22450-0052	27170-0263	46603	46658	46451	46602
	PS314
	PS360/360S
	PS360SS High Speed
	PS360T Tandem
	PS360WB
	PS360WB70
	PS360EWB
	PS555
	PS570/570S Single Belt
1350:1	PS200/220FS/224	27384-0011	22450-0230	27170-0263	46604	46658	46451	46602
	PS200VL/220VL/224VL
	PS200R68/220R68/224R68
	PS200T Tandem
	PS570/570S Split Belt (Standard)
600:1	PS314SBI	27384-0003	22450-0052 27170-0263		46605	46658	46451	46602
300:1	PS200/220FS/224 (High Speed)	27384-0014	22450-0230	27170-0263	46606	46658	46451	46602
	PS570/570S Split Belt (High Speed)

*“New Motor” part numbers shown in this table are kits that include both the motor and the new pickup clamp.

29