Bulletin No. MM-189

SECTION 3 - SERVICING COMPONENTS

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

Brushes, and Pickup Clamps, 8/01

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.

PS224 PS310, PS220, PS555, PS200, PS360 specifications

The Middleby Marshall PS555 is a standout commercial pizza oven renowned for its performance, efficiency, and advanced technologies. Designed with the modern pizzeria in mind, the PS555 delivers exceptional cooking results while maximizing energy efficiency and throughput.

One of the key features of the PS555 is its innovative cooking technology, which incorporates both convection and radiant heat. This unique combination ensures that pizzas are cooked evenly and quickly, achieving a perfectly crispy crust and evenly melted cheese every time. The oven’s high-speed air impingement system accelerates cooking times, allowing pizzerias to serve more customers in less time without compromising quality.

The PS555 is designed with a spacious cooking chamber that can accommodate multiple pizzas simultaneously. With its ability to fit pizzas up to 18 inches in diameter, the oven is ideal for establishments with high demand. Additionally, the adjustable conveyor speed allows operators to customize the cooking time based on their specific menu items, enhancing versatility and productivity.

Energy efficiency is a hallmark of the Middleby Marshall PS555. The oven utilizes advanced insulation materials to minimize heat loss, ensuring that it operates at optimal temperatures while consuming less energy. This efficiency not only reduces operating costs but also contributes to a more sustainable kitchen environment.

User-friendly controls make it simple for operators to manage the cooking process. The PS555 features digital controls with programmable settings, enabling quick adjustments to temperature and cooking time. This ensures consistent quality across different shifts and helps maintain product standards while simplifying staff training.

Durability is another defining characteristic of the PS555. Built with high-quality materials, the oven is designed for heavy use in busy commercial kitchens. Its stainless steel construction ensures resistance to wear and tear, making it a worthwhile investment for any pizzeria.

In summary, the Middleby Marshall PS555 pizza oven is a high-performance piece of equipment that combines advanced cooking technologies, efficiency, and durability. Its ability to deliver consistently excellent results while streamlining operations makes it an essential asset for any pizza business aiming to enhance its productivity and customer satisfaction.

Middleby Marshall PS570, PS360, PS200, PS555, PS220, PS224 PS310 manual Bulletin No. MM-189

Models: PS224 PS310 PS220 PS555 PS200 PS360 PS570

SECTION 3 - SERVICING COMPONENTS