462-2235 Caterpillar 24V Glow Plug (Heater Plug) — Used for cold-start preheating in Caterpillar C-Series diesel engines.

I. Key Specifications

Part Number: 462-2235 (4622235)

Brand: Caterpillar

Type: 24V Glow Plug (Cold-Start Heater Plug)

Voltage: 24VDC

Compatible Engines:

C4.4, C6.6, C7.1, and other Caterpillar electronically controlled diesel engines

Material: Carbon steel with zinc coating (corrosion-resistant)

II. Compatible Models (Mainstream)

Excavators: 323F SA, 320GC, 326GC, 330GC, etc.

Wheel Loaders: 924H/924HZ, 928H/928HZ, 930H, 950GC, 962M, etc.

Dozers: D5, D6K2, D6N, etc.

Soil Compactors: 815K, 816K, etc.

Generator Sets: XQ230, etc.

Others: Motor Graders 120GC/140GC; Material Handlers MH3022/3024/3032/3040, etc.

IV. Common Faults and Diagnostics

Symptoms: Difficulty cold-starting, white smoke during startup, engine vibration, abnormal glow plug indicator light

Diagnostic Methods:

Measure resistance using a multimeter: Normal range is approximately 0.5–2 Ω (at 24V)

Check the wiring harness connector for oxidation, looseness, or short circuits

Listen for the glow plug's operating sound during a cold start (a faint "sizzling" sound)