KEY FACTS
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MAKE: Leyland Daf.
MODEL: FAT 75. 300. CONFIGURATION: 6x4 tipper. SERVICE INTERVALS: Annual distance below 80,000km30,000km interval, over 80,000km-40,000km interval. SERVICE LEVELS: A, B, C.
SERVICE SEQUENCE: Alternating As with B and C. B—once a year, C—once every two years.
STANDARD TIMES: A-2.5hr, B-4hr, C-8.5hr. The safety and maintenance inspection adds 1.5hr.
ENGINE: Daf RS222L, 8.65-litre turbocharged and intercooled six-cylinder in-line diesel. Governed speed 2,300rpm. Valve clearances (hot): inlet 0.5mm, exhaust 0.5mm.
OIL: Capacity 24 litres (inc filter). Spec: CCMC-D5 (SAElOW/30 for -30°C to 50°C, SAE15W/40 for -20°C to 50°C). Oil change: at A, B and C service intervals.
OIL FILTRATION: Replaceable single canister, screw-on full flow with bypass. Fitting procedure: Lubricate sealing ring sparingly with engine oil, screw on until sealing ring touches then a further 1-1.25 turns (or torque to 35-40Nm). Cost of filter: £28.28.
COOLANT: Capacity: 37 litres. Filler neck located behind front grille. Change period: two years. Antifreeze: 33% ethylene glycol and 67% water gives protection to -18°C.
FUEL SYSTEM: Replaceable single canister screw-on filter located on engine block plus a gauze filter in the priming pump banjo bolt. Filter change: every B and C service, or annually. Fitting: lubricate sealing ring sparingly with oil or diesel fuel, hand-tighten. Filter cost: £8.87.
CLUTCH: Hydraulically operated single-plate dry with air assistance 420mm diameter. Adjustment: automatic. Fluid: DOT 4. Change period: top-up only.
GEARBOX: ZF 85 109 eight-speed synchromesh. Oil change period: every B and C service: 8Iit plus 2lit for integrated retarder SAE 80W/90 or SAE8OW to API 014 or CCMC-D4. REAR AXLES: Daf 1132T single reduction, rear axle ratio 4.1:1. Oil change: every B and C service. Capacity: foward axle 21 litres, second axle 15 litres plus 0.8 litre per hub. Specification: SAE 85W/140 API-G15.
FRONT AXLE: Daf 152N. Kingpin check: stub axle setting dimension 0.05-0.3mm: in service play allowed 9.5mm sideways movement on a 22.5inch wheel. Wheel bearing end float: 0.025-0.25mm. Oil filled hubs: check level at every service. Top up with SAE 80W/90 API-GL4 or GL5. Grease filled hubs: strip and repack at every C service.
BRAKES: Drums all round with dual air circuits using spring brake actuators and 5 cams. Minimum air pressure: 6.5bar. Desiccant filter change: annually. Minimum lining thickness: as per wear indicator on brake lining-1 mm above rivet head. Maximum stroke: 35-40mm. Adjustment: automatic. POWER STEERING FLUID: Filter change: every two years or C service. Fluid change: not necessary. Fluid Spec.: ATF type A or ATF DEXRON 11D. Filter cost £4.57.
AIR FILTER: Single replaceable element. Unless blockage indicator shows it may be cleaned once and replaced on the next service (B or C). Cost of filter £91.54.
GREASE: New vehicles have auto chassis lube filled with lithium-based NIG! Class 00. For older vehicles with manual greasing use Lithium-based NLGI class 00 or 2. Grease points: cab hinge pins, front and rear axle spring bolts, front and rear brake cross shafts, front axle kingpins (top and bottom), front and rear axle spring shackles, propshaft UJs (don't forget interaxle slider too), trunnion axle.
TIGHTENING TORQUES: Wheel nuts, 700Nm.
Since its launch in 1993 the Series from Leyland Daf has won many friends in the competitive sixwheel market. As the replacement for the Daf 2300 and the Leyland Constructor, this vehicle came as something of a culture shock to many operators. Boasting a number of notable improvements over its predecessors, Leyland Daf says that one in every five new six-wheel trucks on the road is a 75 Series.
75 Much of this operator-appeal can be put down to practical factors like its narrow cab (2.3m), its good all-round visibility, a sensible re-positioning of the headlights away from the vulnerable bumpers and much more durable steel cab steps.
A general simplicity of construction means straightforward servicing and good levels of reliability. Powered by the Daf 8.65-litre, six-cylinder engine, the 75 Series also has revised suspension with a two-spring rear bogie using Daf's singlereduction axles rated at 11 tonnes.
For a closer look at the servicing requirements of the model we tracked down an October 1993 tipper, showing 39,000km, at Leyland Daf's HQ in Thame, Oxfordshire.