Handbrake lever cables and calipers

From GTM Workshop

Build Manual Build Sequence Monocoque Front End Rear End Doors Finishing Donor Components Rover Metro Donor Components Rover 220/420 Components Build Sections Battery Beam end covers Bonnet and front spliter mould Boot bootlock and hinges Brake lines Carpets Dashboard cover Doors Engine cover moulding Engine frame Engine and auxiliaries Exhaust Front suspension Gear change Handbrake lever cables and calipers Door panels Trim Headlight covers Heater and pipework Lights Part trim panels option Pedal box and master cylinder Perspex screens rear and side Petrol tank filler neck and cap Pipes and services through the tunnel Radiator ducting and splash moulds to monocoque Radiator mould radiator and pipework Rear suspension Roof panel Seat belts Seats and runners Separate instrument option Setting up the car for the road Soft trimming Spare wheel mould and spare wheel Steering rack and column Throttle pedal Trimming hard panels Windscreen and rear bulkhead screen Windscreen washer bottle pipes and jets Wiper motor and blades Wiring Wiring loom insruments and fuse box 1800 gear change p.g.1 gearbox 1800 engine mountings 5AS alarm units Hydraulic clutch 1800 engine steady Spyder Supplement Top Seatbelt Mounting Hood Boot Engine Compartment Grills Stainless Steel Mesh

The GTM Libra utilises the Rover 220i or 420 rear callipers handbrake cables and handbrake lever.

The calliper bolts to the standard Rover Metro front hub assembly employed at the back of the Libra. Special adapting plates are provided in the kit to facilitate this. The cables run from the callipers over the petrol tank and into the driving compartment. The handbrake lever is mounted to the tunnel. The outer cable mounting from the rover 220i / 420 is also utilised next to lever.

Assembly

There are two drawings at the end of this manual relating this paragraph. The standard Rover 220/420 rear gallopers are fitted to the standard K Series Rover Metro front hub assemblies via an adapter plate T1107. This is shown on the centre drawing at the rear of this manual. The adapter plate T1107 is attached to the hub via two 14mm diameter 2mm pitch 20mm long socket cap head screws

To accept the screws the holes in the K Series hubs that originally attached the K Series calliper have to be tapped out appropriately. Fortunately the tapping size hole for the 14mm thread is the hole already in the k Series hub. It is therefore only necessary to tap out these holes. Should you have difficulty in obtaining a suitable tap one is available from GTM Cars LTD on a loan basis.

So that T1107 can fit fleshly against the rear face of the Rover Metro hub it is necessary to fettle (grind or file) the face of the hub casting. Clear away all metal that prevents T1107 fitting flush against the hub face. Using the two 14mm x 2mm x 20mm long socket cap head screws provided in pack T1110 attach the carrier T1107 to the hub.

The Rover 220/420 calliper is attached to the adapter plate T1107 via two spacers T1108. It may be necessary to fettle the side face of the Rover metro hub slightly to enable the spacer to sit squarely on the adapter plate T1107. By placing the 10mm diameter bolt through the hole in T1107 and putting the spacer T1108 on it can be clearly seen which area has to be fettled away.

On the Rover 220/420 callipers the bracket that holds the handbrake cable to the calliper has to be removed before the calliper can be fitted to the adapter plate T1107. The track control arm T0308 on the Libra has a location for the outer cable of the standard Rover 220/420-handbrake cable. The standard solid Rover K Series front disc has to be skimmed to 10mm thickness this is done by GTM Cars Ltd. on an exchange basis.

Once you are satisfied that everything fits together without interference and is square and true assemble the calliper and adapter T11O7 to the hub using the bolts provided. We strongly recommend the use of lock tight or some similar thread locking substance when finally docking up these bolts.

Now mount up the Rover 220/420-handbrake lever to the tunnel as illustrated on the appropriate drawing in the rear of this manual.

Attach the Rover 220/420 standard handbrake lever to the top of the Libra tunnel in the position shown on the drawing using two 8mm set bolts 20mm long and on the inside of the tunnel T1110. Make sure that the handbrake lever is central to the tunnel.

Attach T1105 handbrake cable mounting bracket to the top of the tunnel in the position shown on the diagram using two 6mm diameter 20mm long set bolts, washers and nylon nuts. The Rover 220/420 standard outer cable bracket can now be mounted to T1105 using two 8mm 10mm long set bolts, washers and spring washers. It may be necessary on certain Rover 220/420 outer cable brackets to remove a certain amount of the bracket that is not required.

The two holes can now be drilled in the tunnel of the monocoque to allow the cables to run through over the petrol tank, By carefully elongating these holes it is possible to fit the standard Rover 220/420 handbrake cable grommets neatly into the top of the monocoque tunnel.

The cables run over the top of the petrol tank, over the top of the top wishbones to the outer cable-mounting bracket on the rear steering arm t0308/9. The cables are secured to the top of the top wishbone T0300 using two 10MM P clips per side and number 10 self tapping screws. The handbrake can now be adjusted in the normal manner and should work satisfactorily.