Cummins
Cummins 6CT rocker lever 3934921
Rocker lever for the Cummins 6CT, 6L, QSL and QSB.
Part numbers
- 3934921
Also written as 393-4921
We quote on enquiry. Send the number off the old unit and we’ll check it against the OEM catalogue before you order.
Specification
- Engine models
- 6CT, 6L, QSL, QSB
- Material
- Mild steel
- Country of origin
- India
More for the Cummins 6CT
6 of 16

Cummins 6CT / C8.3 valve seat insert
- 3904715
- 3908830
- 3924582
- +2 more

Cummins 6CT upper gasket set 4025271
- 4025271
- 3800750
- 3802624
- +5 more

Cummins 6CT oil cooler 3974815
- 3974815

Cummins 6CTA sea water pump 4963510
- 4963510
- 3166652

Cummins 6CT engine stop solenoid
View part
Cummins 6CT seal set 3353977
- 3353977
- 39332620
More in Cummins engine spares
6 of 26

Cummins 6CT connecting rod bolt
View part
Cummins X series flywheel housing 0104-2117
- 0104-2117

Cummins 4BTAA3.9 engine spares
- 4089460
- 3934047
- 3283569

Cummins 6BT5.9 engine spares
View part
Cummins KTA38G2 / G5 / G12 engine spares
View part
Cummins VTA1710 / VTA28G engine spares
View part
Not sure this is the right one?
A number that reads clearly can still have been superseded, and an engine model on its own rarely settles fitment. These are worth a few minutes before you order.
How to identify a Cummins engine before ordering parts
Where the dataplate sits, what the serial number and CPL tell you, and why the engine model on its own is not enough to order against.
Read thisCummins 6BT and 6CT: what actually differs
Two engines that look alike across a workshop and share almost no parts. What separates the 5.9 litre B series from the 8.3 litre C series, and where buyers go wrong.
Read thisWhat to send when the part number has worn away
Corroded castings, painted-over plates and rubbed-off labels are ordinary. What identifies a part when its number is gone, and what to photograph.
Read thisPart number index
Every number the catalogue covers, in one list. Search it, or scan it to see whether a number you have been given is one we stock.
Look up a number



