Kohler M340 Microprocessor Logic Automatic and Bypass-Isolation Transfer Switches Parts Catalog (tp5503)

These Kohler M340 transfer switches live in generator rooms, plant rooms, and electrical closets where they automatically shift loads between utility and standby power and, on the bypass-isolation units, let you work on the gear without killing the building. This parts catalog is what I’d keep open when I’m rebuilding a mechanism, replacing a damaged board, or sorting out mismatched hardware. If, for example, a breaker won’t latch after a fault and I’ve got bent linkages or missing spacers, I use this to trace the exploded views, confirm every little washer and bushing, and order the exact revision that matches your switch.

Applications & Use Cases

• Trace exploded assemblies to see how operating handles, linkages, and interlocks fit and what fasteners they require.
• Verify part numbers when replacing contact kits, coils, or logic components so you don’t mix early and later M340 revisions.
• Identify small wear items—seals, bushings, shims—that often get overlooked but cause sloppy operation.
• Cross-check hardware after a field repair to ensure all brackets, covers, and mounting pieces are back in the right place.
• Reduce wrong orders by matching options and ratings to the specific switch nameplate before you buy parts.

FAQ

Q: Can I use this catalog on a tablet in the field?

A: Yes, it’s practical to zoom in on the diagrams on a tablet or laptop, which makes tiny callouts and hardware details much easier to see.

Q: Should I still print pages from this catalog?

A: For bench work, many techs print the relevant exploded view so they can mark off parts as they remove and reinstall them.

Safety Note

Always isolate and lock out all power sources before opening or servicing any transfer switch components.

Kohler M340 Microprocessor Logic Automatic and Bypass-Isolation Transfer Switches Parts Catalog (tp5503) Index:

Introduction
Contactor Service Parts
Standard Hardware and Leads
How to Find Part Numbers
Accessory Part Numbers
Consult Factory
Kohler Part Number Key
Explanation of Kohler Part Number
Transfer Switch Breakdown Diagram

Enclosures
Automatic NEMA Type 1 30–800 Amp
Automatic NEMA Type 1 1000–1200 Amp
Automatic NEMA Type 1 1600–2000 Amp
Automatic NEMA Type 1 3000–4000 Amp
Automatic NEMA Type 1 CSA 30–800 Amp
Bypass Isolation NEMA Type 1 150–400 Amp
Bypass Isolation NEMA Type 1 600–800 Amp
Bypass Isolation NEMA Type 1 1000–1200 Amp

Inner Door Panel

Neutral Lug
NEMA Type 1
NEMA Type 1 CSA

Transformer

Accessories

Kohler