Fuel filter, cartridge type-Replace at free service 1.500 km (1,000 miles) and
thereafter every 20.000 km (12,000 miles) or 12 months.
The cartridge provides an additional filter between pump and cariburetter.
Replace as follows:
1 Disconnect fuel pipes from each end of filter.
2 Slacken clip securing filter and withdraw unit.
3 Fit new filter with flange uppermost, tighten securing clip and refit fuel pipes.

Engine flame traps-Every 20.000 km (12,000 miles) or 12 months.
Replace as follows:
1 Remove the flame traps, one on top of each rocker cover by pulling off the hoses.
2 Replace the flame traps, which are located in position by the hoses.

Fuel filter, cartridge type
A-Fuel pipe
B-Clip
C-Fuel filter

Air cleaner-Every 20.000 km (12,000 miles) or 12 months.
Attention to the air cleaner is extremely important. Replace elements every 10.000 km (6,000 miles) or 6 months, under severe dusty conditions, as performance will be seriously affected if the car is run with an excessive amount of dust or Industrial deposits in the element.
Proceed as follows:
1 Slacken off the two hose clips at each side of the air cleaner and release the two elbows.
2 Disconnect hose, engine breather filter to air cleaner, and the return petrol pipe clipped to the front of the air cleaner.
3 Unclip the cold-start cable from the air cleaner. Then remove the air cleaner body by easing it from over the domed retaining studs.
4 The elements can now be removed by releasing the three clips at each end of the air cleaner body. Withdraw end plates and elements. Unscrew wing nuts to release elements.
5 Discard old elements and replace with new units.
6 Ensure that the sealing washers on air cleaner and carburetter adaptors are in position and Intact.
7 Reassemble by reversing the removal procedure.

Engine breather filter-Every 40.000 km (24,000 miles) or 24 months.
Replace as follows:
1 Remove air cleaner, see previous operation.
2 Disconnect hoses.
3 Slacken clip and withdraw filter.
4 Fit new filter, with the end marked 'IN' uppermost. Alternatively, if the filter is marked with arrows, they must point downwards.

Engine oil level-Every 1.000 km (750 miles) and at every maintenance inspection.

Proceed as follows:
Stand the car on level ground and allow the oil to drain back into the sump. Withdraw the dipstick, wipe it clean, re-insert to its full depth and remove a second time to take the reading. Add oil as necessary through the screw-on filler cap on the right-hand front rocker cover. Never fill above the 'High' mark.
The oil filler cap with the dipstick attached at the right-hand rear of the engine is for the automatic transmission oil.

Carburetter hydraulic dampers-At free service 1.500 km (1,000 miles) and thereafter every 10.000 km (6,000 miles) or 6 months.
Unscrew the cap on top of each suction chamber, withdraw cap and hydraulic damper, replenish the damper reservoir as necessary with SAE 20 oil to within about 25 mm (1 in.) from the top of the tube. Then replace cap and hydraulic damper.

Accelerator linkage-At free service 1.500 km (1,000 miles) and thereafter every 10.000 km (6,000 miles) or 6 months.
I Prior to carburetter adjustments, lubricate the accelerator linkage using clean engine oil, paying particular attention to the accelerator coupling shaft and control rod ball joint.
2 Check the linkage for correct operation and ensure that there is no tendency to stick.
Badly worn parts should be replaced.

Carburetter slow-running adjustment-At free service 1.500 km (1,000 miles) and thereafter every 10.000 km (6,000 miles) or 6 months.
Carburetter adjustment should be carried out by a Rover Distributor or Dealer as special equipment is required.
Should the carburetters require adjustment for any reason, proceed as follows:
1 Set the gear selector at the 'P' (park) position.
2 Run the engine until normal operating temperature is obtained.
3 Remove air cleaner.
4 Slacken screws securing throttle lever to carburetter lever on each carburetter.
5 Using an approved carburetter throttle balancing device, turn the slow-running adjustment screws until an identical reading is obtained on both carburetters at an engine speed of 600 revs/mm.
6 Place a 0,15 mm (0.006 in.) feeler gauge between the right leg of the fork and the pin on the right-hand carburetter.
Apply light pressure to the linkage to hold the feeler, then tighten throttle lever securing screw.
7 On the left-hand carburetter apply pressure to the throttle lever to hold it lightly against the roller on the countershaft lever, tighten the throttle lever securing screw.

On early models fitted with a manual choke control:
8 The fast-idle screws should not require adjustment; however if adjustment becomes necessary, pull out the cold start control until the cold start warning light just comes on. Adjust fast idle adjustment screws until an identical reading is obtained on both carburetters with the balancing device, at an engine speed of 1,400 rev/min. Push the cold start control in again.
9 Replace the air cleaner.
10 Check the mixture on each carburetter separately by lifting the carburetter piston approximately 1 mm (0.031 in.) by means of the lift pin situated on the front of the carburetter body. There is approximately 4,5 mm (0.187 in.) free movement of the lift pin before it contacts the piston.
11 If the engine speeds up immediately the mixture is too rich and the mixture adjustment nut must be screwed up, thus weakening the mixture; if the engine speed decreases immediately the mixture is too weak and the mixture adjustment nut should be unscrewed to enrich the mixture. In either case turn one flat at a time and check after each adjustment. If the engine speed momentarily increases very slightly the adjustment is correct.
12 Road test car for 5km (3 miles) and stabilise carburetter temperature and repeat checks 10 and 11. Re-check slow running adjustment. If incorrect, adjust by turning each slow running screw an equal amount.

Throttle lever setting, left hand
A-Countershaft lever with nylon roller
B-Throttle lever, left hand
C-Fast idle adjustment screw, left hand. On early models only
D-Slow running adjustment screw

Carburettor hydraulic damper
A-Cap and hydraulic damper

Downshift cable adjustment-At free service 1.500 km (1,000 miles) and thereafter every 10.000 km (6,000 miles) or 6 months, as part of carburetter adjustment procedure.
1 Run car for a minimum of 4 km (3 miles) to ensure engine and transmission are at normal running temperature.
2 Chock vehicle front wheels and apply handbrake, also apply foot-brake during the procedure.
3 Remove the line pressure take-off plug from the rear of the transmission case, using a suitable Allen key.
4 Connect the line pressure gauge to the pressure take-off point.
5 Connect the tachometer. If the tachometer in use is for 4 and 6 cylinder models, use the 4 cylinder position and note that the reading on the tachometer will be double the actual engine revs/min, that is 500-550 will show as 1000-1100 revs/min.

6 Start the engine and allow to idle evenly.
Select 'D' position and check pressures; see chart below. Engine speed must be increased by the use of the accelerator pedal, not by manual manipulation of the carburetter linkage. There must be progressive rise in pressure between engine idle speed and 1,200 revs/mm corresponding to accelerator pedal movement.
7 If the pressure is low, increase as follows:
8 Slacken the adjuster locknut on the transmission downshift cable.
9 Screw out the cable adjuster.
10 If the pressure is high, then the effective length of the cable should be decreased by screwing in the cable adjuster.
11 Tighten the adjuster locknut.
12 Switch off the engine. Disconnect the pressure gauge and replace the line pressure take-off plug, tighten the plug to a torque of 0,5 to 0,7 mkg (4 to 5 lb ft.).