Trelawny SF3EX, Operation And Maintenance Manual

www.trelawny.co.uk

Trouble Shooting

Cause

Action

Poor performance or lack of power.

Low air pressure.

Ensure that the air pressure is correct at 90psi, max 100psi.

If tool has been left for some time without use, the oil may dry out  

slightly, causing a sticky residue.

Strip tool down, clean and re-oil.

Tool worn out, can you feel side ways movement between the piston 

and cylinder bore.

Replace the piston and cylinder, along with a new bush seal.

Tool continues to run with trigger released.

Valve seal may have become dislodged through the tool being 

disconnected with the trigger in the open position.

Ensure that the trigger has not been taped or wired in the 

open position.

Tapered cutterhead will not stay on piston.

Air pressure too high, piston hits bottom of cylinder

 causing head to be jettisoned.

Ensure that the air pressure is correct at 90psi, max 100psi.

Traces of oil remained on the tapered surfaces when replacing

 cutter head.

Ensure that the cutterhead and pistons tapers are completely free of 

oil, use a good degreasing agent and clean cloth prior to assembly.

Item NO.

PART NO.

DESCRIPTION

1

615.3021

Valve Cap

2

809.0139

Valve Cap O’Ring

3

712.3022

Valve Spring

4

618.3022

Valve Stem

5

809.0089

Valve Seat O’Ring

6

*423.5321

Valve Body Assembly

7

716.3000

Throttle Lever

8

813.0108

Roll Pin

9

711.5301

Adaptor

10

624.5301

Main Handle (Standard Tools)

11

717.5301

Rubber Grip

12

625.5301

Locknut

13

810.9001

Sealing Washer

14

634.5301

Hexagon Plug

15

822.5302

Side Handle Grip

16

422.5315

Side Handle

17

615.5341

Screwed Cap

18

712.5301

Compression Spring

19

615.5361

Spring Cap

20

612.5301

Piston (Std taper fit)

21

613.5301

Cylinder (Std taper fit)

22

614.5301

Brush Seal

23

611.5301

Triple Scaler Body (Std taper fit)

25

606.5303

Beryllium Copper Head (Taper Fit)

31

827.0428

Cutterhead Removal Pin

32

633.5301

Cutter Head Removal Washer

446.1530x

Service Kit 

(2,4,5,7,8,17,18,19,20,22,25,31,32)

parts list