Part Number: 334/E1182
Alternative Numbers: 02/630591
Type: Cooling System Thermostat
Opening Temperature: 75°C
Diameter: 34 mm
Designed for JCB mini excavators, including the MICRO and MINI CX series, as well as other machines equipped with Perkins engines. The thermostat regulates the engine’s operating temperature by opening the main coolant circuit once the temperature reaches 75°C. It ensures rapid engine warm-up and protects the engine from overheating.
⚠️ Safety Warning
Thermostat failure is one of the most common causes of serious engine damage.
| Brand | Type / Series / Model |
|---|---|
| JCB | Mini Excavators, MICRO, MINI CX |
| Perkins Engines | GG/GM/GT Series (e.g., 402D-05): GG, GJ (numerous variants), GM65619J, GM65620J, GM65621J, GM65705J, GM65716J, GM65744J, GM65816J, GM65831J, GM65870J, GM66003JPB, GM66004JPB, GM66073J, GM66078J, GM66150J, GM71105J, GT51789R, GT51789U |
| Perkins Engines | HH/HB/HD/HN Series (e.g., 403C-11, 404C-15): HB, HD, HH (numerous variants), HN30865J, HN81541J, HN81579J, HN81592J, HN81596J |
| Perkins Engines | KA/KB/KL/KN Series (e.g., 102-04, 103-06, 103-07): KA30213, KA30214, KA30215, KA30283, KA30284, KA30285, KA30286, KA30289, KA30290, KA50348, KA50379, KA70249, KA80580, KA80610, KA80633, KA80661, KB30216, KB30217, KB30218, KB30219, KB30220, KB30221, KB30222, KB30223, KB30224, KB30270, KB30271, KB30292, KB30293, KB50350, KB50381, KB70238, KB80606, KB80649, KL (numerous variants), KN30305, KN30306, KN30307, KN30308, KN30309, KN30327, KN30328, KN70333, KNC2800U, KS81171J |
| Perkins Engines | EJ/EG/EH Series: EJ71145N, EJ82489U, EG - 402F-05, EH - 403F-07 |
| Perkins Engines | Models: 102-04, 102-05, 103-06, 103-07, 103-11, 403C-07, 403C-11, 403D-11, 404C-15, 404D-15 |
The list above is for reference. Due to the vast number of compatible engines, it is crucial to confirm the opening temperature (75°C) and diameter (34mm).
Data sheet
Specific References
Manufacturer
Responsible person







Designed for JCB mini excavators, including the MICRO and MINI CX series, as well as other machines equipped with Perkins engines. The thermostat regulates the engine’s operating temperature by opening the main coolant circuit once the temperature reaches 75°C. It ensures rapid engine warm-up and protects the engine from overheating.

















