About this part
JX493ZQ1 is supplied as a remanufactured replacement fuel injection pump. Cross-reference numbers: JX493ZQ1, 000106BV42B, NJ-VE4, 11F1900, LNJ03. Application recorded for this part: JMC 4JB1.
This unit sets both quantity and timing for every cylinder. Modern engines depend on that timing being accurate to well under a degree, so internal wear that would once have been tolerated now shows up as smoke, noise and failed emissions checks.
Expect extended cranking especially when hot, hesitant throttle response, smoke that persists rather than clears, timing that drifts or will not hold, and in some cases fuel in the sump or a pump body running unusually hot.
Diagnose the supply side before blaming the pump. Restricted filters, a tired lift pump or air being drawn into the suction line will produce symptoms almost identical to internal pump wear, and are far cheaper to resolve.
Installation notes: never rotate the pump by force to align it — bar the engine over instead. Prime before cranking, renew the drive seal, confirm supply pressure, and bleed the system properly. Dry running for even a few seconds is the most common cause of premature failure on an otherwise sound pump.
Rebuilt rather than refurbished: full teardown and measurement, worn components replaced instead of cleaned and reused, sealing surfaces restored to specification, then bench calibration and testing. The record is what separates this from a used part — we can provide the test sheet for your order. Covered by a 12-month warranty.
Specifications
| Part number | JX493ZQ1 |
| Condition | Remanufactured (not a genuine OEM new part) |
| Cross-reference | JX493ZQ1, 000106BV42B, NJ-VE4, 11F1900, LNJ03 |
| Application | JMC 4JB1 |
| Process | Disassembled, cleaned, measured, wear parts replaced, machined to specification |
| Bench test | Delivery, return flow, opening pressure and leakage recorded before dispatch |
| Warranty | 12 months |
Fitment note. Several part numbers in this family look similar. Confirm the number on your
existing unit, the engine model and the machine or vehicle application before ordering. Send us a nameplate photo
and we will verify the match before dispatch.
All manufacturer names, symbols and part numbers are used for identification and cross-reference purposes only. We are not an authorised distributor and are not affiliated with the original equipment manufacturer. Products offered are remanufactured or new aftermarket replacement parts unless stated otherwise.
