Description
RMS 24 635 0420 Stator 1139g | Alternator Stator | Buy Now
The RMS 24 635 0420 stator 1139g is a new alternator stator assembly from RMS. Weighs 1139g. 36-pole. £143.99. EU warehouse. Ships today.
Problem – Alternator Overheats and Output Drops
Your alternator runs hot. You can feel the heat from the housing after 30 minutes of driving.
The battery light flickers at highway speed. Voltage drops when you turn on lights or blower.
You replaced the regulator and rectifier. The problem returns within months.
The RMS 24 635 0420 stator 1139g is the component that fails in this scenario.
Root Cause – Undersized Stator Windings Overheat
The stator is the stationary set of copper windings inside your alternator. It generates three-phase AC current when the rotor spins inside it.
High-output alternators require more copper mass. The 24 635 0420 RMS alternator stator weighs 1139g. That is significantly heavier than standard stators.
Why weight matters. Copper generates heat when current flows through it. More copper means less resistance. Less resistance means less heat. Lighter stators (740g) cannot handle high continuous loads. They overheat. Insulation breaks down. Windings short together.
When the RMS stator 24 635 0420 1139g fails, output drops. The alternator cannot supply enough current for all electrical loads. Your battery drains. Lights dim. Eventually, the alternator stops charging entirely.
For technical validation, RMS’s alternator component documentation explains the relationship between stator copper mass, heat dissipation, and alternator output capacity.
Solution – RMS 24 635 0420 Stator 1139g
RMS 24 635 0420 stator 1139g is a high-mass stator assembly manufactured for high-output alternator applications.
This 24 635 0420 RMS alternator stator includes the stator core and three-phase copper windings. The windings are vacuum-impregnated with high-temperature insulation rated for continuous heavy load.
The RMS stator 24 635 0420 1139g weighs 1139g. That is the correct copper mass for high-output alternator frames (90A-120A range). The additional 400g of copper (compared to standard 740g stators) provides lower resistance and better heat dissipation.
Install this 1139g alternator stator . Your alternator handles full electrical load without overheating. Output stays stable at 13.8-14.4V even with lights, blower, and refrigeration running.
Fitment – Which Alternators Accept This Stator
This RMS stator 1139g fits high-output alternator frames with larger stator housings.
Compatibility logic:
Remove your alternator. Extract the existing stator.
Measure the stator outer diameter, inner diameter, and stack height.
Count the number of poles (this unit has 36 poles).
Weigh your old stator. Compare to 1139g.
If your old stator weighs approximately 1100-1200g, this RMS alternator stator is the correct replacement for high-output applications.
Do not use this stator in standard-output alternator frames. The heavier copper windings may not fit physically. Always verify your old stator dimensions.
For cross-reference verification, search the RMS alternator parts catalogue using the part number 24 635 0420.
Specifications for RMS 24 635 0420 stator 1139g
| Specification | Detail |
|---|---|
| Item number | 24 635 0420 |
| Trade numbers | RMS 24 635 0420 |
| Manufacturer | RMS |
| Product type | Stator, alternator |
| Weight | 1139g |
| EAN | F6BAC7 |
| Pole count | 36 |
| Application | High-output alternators (90A-120A) |
| Condition | Brand New |
| Price | £143.99 |
Installation – Replacing Your RMS 24 635 0420 stator 1139g Alternator Stator
Replacing the stator 1139g requires full alternator disassembly.
Step-by-step:
Remove the alternator from the engine.
Remove the rectifier, regulator, and brush holder.
Remove the rotor from the housing.
Remove the old alternator stator from the housing. It may be pressed in or held by screws.
Clean the housing interior thoroughly. Remove any rust or debris.
Insert the new RMS stator into the housing.
Ensure the winding leads align with the rectifier connection points.
Reinstall the rotor, rectifier, regulator, and brush holder.
Solder or crimp the stator phase wires to the rectifier.
Reinstall the alternator. Test output voltage under full load (lights, blower, defroster).
Warning: This high-mass stator requires adequate soldering skill. Use 80W+ soldering iron and high-temperature solder (60/40 tin/lead minimum). Cold solder joints will fail under high current. Generator / Alternator Parts
FAQs – Diagnostic Questions for High-Output Stators
Q: How do I know my alternator needs a RMS stator 1139g?
A: Alternator overheating, voltage drop under load, or repeated regulator/rectifier failure with a high-output alternator points to stator failure. Weigh your old stator. If it matches 1139g, this is the correct replacement.
Q: Can I use this RMS alternator stator in a standard alternator?
A: No. The 1139g stator is physically larger than standard 740g stators. It will not fit in smaller alternator housings.
Q: Why is this RMS stator 1139g more expensive than lighter stators?
A: Copper is expensive. The 1139g stator contains significantly more copper than lighter stators. More copper means better performance and longer life under high load.
Q: How long should a 1139g alternator stator RMS last?
A: 300,000-500,000 miles in high-output applications. The additional copper mass runs cooler, which extends insulation life.
Q: Can I install this RMS stator 1139g myself?
A: If you have alternator rebuilding experience and strong soldering skills, yes. High-current connections require proper technique. If not, take the alternator to an auto electrician.
Q: What is the warranty on this product?
A: 30-day returns from autosparepart. RMS offers manufacturer warranty on material defects.
– Why Buy From Us
EU warehouse – Netherlands stock. Fast customs clearance.
Ships today – Orders before 2 PM CET dispatch same day.
Brand new – Genuine RMS. Factory sealed.
30-day returns – Unused stator in original packaging.
No minimum order – One stator or ten. Same fast service.
