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SKU:
NLT1G00139
Ships for free in 2–4 business days.
Yanmar 3TNV88 Glow Plug Timer Relay 129211-77920
$28.99
In Stock
$28.99
Sale price
$28.99
Regular price
This new aftermarket diesel preheat timer relay replaces Yanmar 129211-77920 for compatible 3TNV88 engine and excavator applications.
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Compatible Models
We do our best to list all compatible models. Although this may be the part you need, your exact model may not appear below.
Compatible equipment / model
- Yanmar 3TNV88 diesel engine applications
- Excavators and compact equipment using timer 129211-77920
- Bobcat / Solar SL75-V applications only when the installed module matches
- Additional industrial equipment with the same Yanmar engine and connector
Product Overview
Cold hard starting with good glow plugs, no preheat lamp timing, or a relay command that ends too early can lead to the timer unit. Battery voltage, coolant-temperature input, glow relay, fuse, wiring, plugs, and engine compression should be tested first.
The electronic module controls the timing signal for the diesel preheat or related shutdown circuit used by the host machine. Listings sometimes call it a glow-plug timer or flameout timer, so the connector and exact part number must settle the identification.
Match 129211-77920, HC0119 marking if present, connector, pin count, case and mounting, system voltage, Yanmar engine, host equipment, and serial number.
Key Features & Performance
- Electronic timing module for compatible diesel control circuits
- Connector and housing pattern for 129211-77920
- Replacement for a verified missing or unstable timer output
- Compact sealed-style case for equipment mounting
Replaces Part Numbers
- 129211-77920
- 12921177920
- HC0119
Common Uses
- Restoring glow-cycle control in cold weather
- Replacing a timer damaged by moisture or voltage spikes
- Correcting a preheat command that never energizes the relay
Technical Specifications
- Product Type: Diesel timer / glow-plug control module
- Engine: Yanmar 3TNV88 applications
- Primary Reference: 129211-77920
- Condition: New aftermarket replacement
Installation & Fitment
- Disconnect battery power
- Read codes and test the glow relay and plugs
- Confirm module supply, ground, and control inputs
- Compare pinout before connecting the replacement
- Verify cold-start timing without overheating the glow plugs
Compatibility Notice
Northline Parts does its best to list all known compatible models, but the correct part may fit an application that is not shown above. Model year, production date, serial number, engine or equipment specification, installed options, and previous repairs can change fitment. Match the original part, reference number, dimensions, connectors, mounting points, and product photos before purchase.
Frequently Asked Questions
Q: Is this the high-current glow-plug relay? A: It is identified as the timer/control unit; some machines use a separate high-current relay. Compare the circuit diagram.
Q: Can bad glow plugs make the timer look faulty? A: Yes. Open plugs, low voltage, wiring resistance, or a bad relay can create the same complaint.
Q: Will it fit every 3TNV88 installation? A: No. The host machine wiring and original module must match.
Q: Is this an original-equipment part? A: No. This is a new aftermarket product. Brand names and part numbers are used only to identify compatible applications.
Part Summary
keywords: Yanmar 129211-77920 timer relay, 3TNV88 glow plug controller, HC0119 diesel timer replacement, excavator hard cold start relay, Yanmar preheat module
Brand names, model numbers, and reference part numbers are used for identification and compatibility purposes only. Verify the original component, specifications, and application before purchase.