Use the numbered Stromberg Carlson exploded diagram to identify replacement switches, level caps, foot pads, safety pins and electric drive parts for the JET-3555 white and JET-3755 black 3,500 lb trailer tongue jacks. Match the model label and the original component before ordering; not all colour and foot-style variations use identical parts.

Factory numbered exploded parts drawing

Stromberg Carlson's illustrated installation manual includes the A1–P component diagram on page 2, showing the switches, motor, gearbox, manual crank, power cable, cap, lower jack tube and foot.

View JET-3555/JET-3755 numbered manufacturer diagram (PDF)

Find the matching complete jack

JET-3555 — White electric tongue jack

Stromberg Carlson JET-3555 white electric tongue jack product photograph

3,500 lb rated, 12V electric A-frame jack with 18 inches of vertical travel. The white head uses the matching 2500-3555E level cap.

View JET-3555 jack

JET-3755 — Black electric tongue jack

Stromberg Carlson JET-3755 black electric tongue jack product photograph

3,500 lb rated, 12V electric A-frame jack with 18 inches of vertical travel. The black head uses the matching 2500-3755E level cap.

View JET-3755 jack

Replacement parts by diagram callout

These are manufacturer part numbers from the original 3,500 lb jack drawings and current replacement-parts list. The white and black level caps differ; match grooved or non-grooved lower legs before buying a replacement foot.

Drawing key Part number Component
A1 2500-03 Extend/retract operating switch
A2 2500-04 Light on/off switch
B 2500-05 Switch boots (two-pack)
C 2500-06 LED lamp and lens
D — Circuit breaker
E 2500-3555E White cap with bubble level, JET-3555
E 2500-3755E Black cap with bubble level, JET-3755
F — Motor and drive housing
G 2500-3755F / 2500-3755G Foot pad, grooved / non-grooved leg versions
H 2500-26 3/8-inch foot-pad safety pin
I 2500-24 Emergency manual crank
J — Three mounting star washers
K — Power lead and fuse holder
M — Gearbox
N — Wire butt connector
O — Ring terminal
P 2500-3755K 30-amp spare fuse

Which component should you check?

Jack will not run: Check battery voltage, the 30-amp fuse, breaker and mounting-plate ground before assuming a motor failure. Missing level cap: 2500-3555E is white and 2500-3755E is black; the separate bubble-level insert is 2500-01. Loose or missing foot: The locking pin is 2500-26, and foot styles differ by lower-leg design. Damaged switch: A1 controls raising/lowering and A2 controls lights; both have separate numbers.

Installation and safety

These jacks operate on 12V DC and provide 18 inches of vertical travel. Stromberg specifies a 2¼-inch outer tube, a 5½-inch foot pad and a lower support plate beneath the trailer frame. Secure the trailer and support its tongue independently before service; never work beneath an unsupported load. Follow the manufacturer instructions for grounding and the emergency manual crank.

Shop other RV jacks and leveling equipment. The JET-2500, JET-4500 and JET-5000 families have different capacities and may require different replacement components.

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