Toshiba Gate Arm Spring SPG-E-ARM-GATE-85-H373 for e-STUDIO 3518A 4518A 5018A

OEM Return Spring for the Paper Exit Gate

The Toshiba gate arm spring is the OEM return spring for the gate arm in the paper exit section of e-STUDIO 3518A, 4518A and 5018A copiers. Toshiba issues the part under number 6LK51917000, coded SPG-E-ARM-GATE-85-H373. Two hook ends locate the spring on the gate arm and on the frame post.

The spring keeps the diverter gate seated while sheets travel to the exit tray. Tension holds the arm against its stop, so the gate does not flutter at rated copy speed. A stretched or fatigued spring lets the arm drift, and paper then skews or jams at the exit rollers.

Technicians replace the part during exit-section service or when jam logs point at the gate area. The job needs no calibration and no software step. Remove the exit cover, unhook the old spring, seat the new one on both posts, then refit the cover. The Toshiba service manual lists the removal order for each model.

The part fits the 3518A, 4518A and 5018A only. Other e-STUDIO series use different gate hardware, so check the model plate before ordering. Keep one copier gate spring per machine in the service kit. The item ships as a single unit in Toshiba OEM packaging.

Key Features

• Genuine Toshiba part number
  Toshiba lists the part as 6LK51917000 under the code SPG-E-ARM-GATE-85-H373.

• Hook-end spring form
  Both ends form closed hooks that seat on the gate arm and the frame post without tools.

• Gate arm return function

  • Holds the diverter arm against its mechanical stop.
  • Keeps the gate seated as sheets pass to the exit tray.
  • Limits arm flutter at the machine’s rated copy speed.

• Exit section service part
  The paper exit spring sits behind the exit cover and swaps without removing the fuser or the duplex unit.

• Model fitment

  • Fits e-STUDIO 3518A, 4518A and 5018A chassis.
  • Does not fit other e-STUDIO series.
  • Verify the model plate before ordering.

• Service kit item
  One e-STUDIO spare spring per pack suits scheduled maintenance and jam-recovery callouts.

Specifications

What’s in the Box

• One gate arm return spring, 6LK51917000

Why Choose the 6LK51917000

• The gate arm tension spring matches the original hook spacing, so it seats without bending.

• A fresh exit gate spring restores arm return and removes the skew that worn tension causes.

• One part number covers three e-STUDIO models and reduces spares line items.

• The spring swaps during routine exit-section service, which avoids a second callout.

• Genuine Toshiba supply keeps the gate assembly within its design tolerances.

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