Tri-ang S.2021

Worm Wheel x 1

Last updated: 26 September 2026

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Fits these locomotives

Tri-ang service sheet 2a: Chassis, January 1959 For R.52, R.152, R.153, R.251

S.2021 is also on 2 (Nov 1955).

Replaces Servicing Sheet No. 2 for models produced from 1st January, 1959.

Tri-ang service sheet 2a: Chassis, January 1959: exploded diagram and numbered parts list, including S.2021
S.2021 is on this sheet. Select it to enlarge.
Other versions of this sheet (1): 2
  • Tri-ang service sheet No. 2: Chassis, November 1955

    Lists S.2021. Replaced by 2a.

    Tri-ang service sheet No. 2: Chassis, November 1955: exploded diagram and numbered parts list

Tri-ang service sheet 2b: Chassis, May 1961 For R.52, R.152, R.153, R.251

As produced after 1st January, 1961.

Tri-ang service sheet 2b: Chassis, May 1961: exploded diagram and numbered parts list, including S.2021
S.2021 is on this sheet. Select it to enlarge.

Tri-ang service sheet No. 3: Chassis, November 1955 For R.50

Tri-ang service sheet No. 3: Chassis, November 1955: exploded diagram and numbered parts list, including S.2021
S.2021 is on this sheet. Select it to enlarge.

Tri-ang service sheet 3a: Chassis, May 1961 For R.50

As produced after 1st January, 1961.

Tri-ang service sheet 3a: Chassis, May 1961: exploded diagram and numbered parts list, including S.2021
S.2021 is on this sheet. Select it to enlarge.

Tri-ang service sheet No. 4: Chassis, November 1955 For R.53, R.54, R.56

Tri-ang service sheet No. 4: Chassis, November 1955: exploded diagram and numbered parts list, including S.2021
S.2021 is on this sheet. Select it to enlarge.

Tri-ang service sheet 4a: Chassis, May 1961 For R.53, R.54, R.56, R.258

As produced after 1st January, 1961.

Tri-ang service sheet 4a: Chassis, May 1961: exploded diagram and numbered parts list, including S.2021
S.2021 is on this sheet. Select it to enlarge.

Tri-ang service sheet No. 9: Chassis, November 1955 For R.59

Tri-ang service sheet No. 9: Chassis, November 1955: exploded diagram and numbered parts list, including S.2021
S.2021 is on this sheet. Select it to enlarge.