Bobcat 763 service schedule

Bobcat skid steer loaders (skid steer) · 1994–2002

Every maker's service job for the Bobcat 763, counted in hours, with the oils, filters and parts each one needs. Add your telehandler to Farmyard Workshop and it works out what's due from your hours and dates, and keeps the service history.

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Service intervals

Job	When
Greasing loader pivots (every 10 hours)	every 10 hours
Engine oil and filter change	every 250 hours or every year
Fuel filter change	every 250 hours or every year
Hydraulic / hydrostatic filter and reservoir breather cap	every 500 hours or every year
Hydraulic fluid, filter and case drain filters change	every 1,000 hours or every year
Chaincase (final drive) oil change	every 1,000 hours or every year
Engine air filter elements (when the indicator shows)	when needed

Service jobs and parts

Greasing loader pivots (every 10 hours)

Chassis · every 10 hours

Bobcat names the grease points for the 763: lift arm pivots, lift links, lift and tilt cylinders, and the Bob-Tach pivots and wedges, every 10 hours, with multipurpose lithium-based grease. Every 250 hours it also lists the steering lever pivots (if fitted), and every 100 hours the engine-to-pump drive coupler (if fitted).

Part	Qty	Notes	Part number
Multipurpose lithium-based grease	1		check your handbook

Step-by-step

Park level, lower the arms with the bucket flat on the ground, stop the engine and take the key out.
Wipe each nipple clean before greasing.
Grease the lift arm pivots, lift links, both ends of the lift and tilt cylinders, and the Bob-Tach pivots and wedges until fresh grease shows.
Every 250 hours also grease the steering lever pivots, and every 100 hours the drive coupler if your machine has a nipple there.
Wipe off the surplus grease.

Tools: Grease gun, Rags

Engine oil and filter change

Engine · every 250 hours or every year

Bobcat's 763/763H service manual schedule says the first oil and filter change must be at 50 hours, then every 250 hours or 12 months, using CD-or-better oil and a Bobcat filter.

Part	Qty	Notes	Part number
Engine oil	1	≈7.1 L with filter. API CD or better; viscosity: check your handbook	check your handbook
Engine oil filter	1	Genuine Bobcat; listed for the 763. Fit can vary by serial number, so check your serial with the dealer	6675517

Step-by-step

Park on firm level ground, lower the lift arms with the bucket flat on the ground, stop the engine and take the key out.
Let the engine cool until it is warm, not hot. Wear gloves: hot oil burns.
Open the rear door, remove the sump plug and drain the oil into the tray.
Unscrew the old filter and make sure its seal comes off with it.
Oil the new filter seal and screw the filter on by hand only.
Refit the sump plug and fill with oil to the full mark. Do not overfill.
Start the engine, check for leaks, stop it, wait a few minutes and recheck the dipstick.

Tools: Drain tray (10 L), Filter wrench, Spanner for sump plug, Funnel, Gloves, Rags

Fuel filter change

Fuel · every 250 hours or every year

Bobcat lists replacing the fuel filter every 250 hours (or every 12 months, per the 763/763H service manual), and draining trapped water from it every 10 hours.

Part	Qty	Notes	Part number
Fuel filter with water separator	1	Genuine Bobcat; listed for the 763. Check your serial with the dealer	6667352

Step-by-step

Park level, lower the lift arms to the ground, stop the engine and take the key out. No smoking or naked flames.
Clean around the filter head so no dirt gets in.
Drain the filter into a container, then unscrew it.
Fill the new filter with clean diesel if your handbook says to, oil its seal and fit it by hand.
Bleed air from the fuel system as your handbook shows, then start the engine and check for leaks.

Tools: Filter wrench, Container for fuel, Rags, Gloves

Hydraulic / hydrostatic filter and reservoir breather cap

Hydraulics · every 500 hours or every year

Bobcat lists replacing the hydraulic/hydrostatic filter and the reservoir breather cap every 500 hours or 12 months (the 763/763H service manual puts the filter itself at 1,000 hours, with the fluid, and the breather cap at 500 hours; we keep the shorter figure). This is more often than the fluid change (1,000 hours), so it is a separate filter task. Change the filter sooner if the transmission warning light stays on for more than 5 minutes once the fluid is warm.

Part	Qty	Notes	Part number
Hydraulic / hydrostatic filter	1	Genuine Bobcat; listed for the 763. Check your serial with the dealer	6661248
Reservoir breather cap	1	Check your handbook	check your handbook
Bobcat Hydraulic/Hydrostatic Fluid for topping up	1	Bobcat 'Proven Performance' (orange) hydraulic/hydrostatic fluid, 2.5 US gal (≈9.5 L) container; Bobcat's parts shop lists the 763	6903117

Step-by-step

Park on firm level ground, lower the lift arms with the bucket flat on the ground, stop the engine and take the key out.
With the engine off, move the lift, tilt and auxiliary controls a few times to let out trapped pressure. Oil under pressure can pierce skin.
Clean around the filter, unscrew it and catch the oil.
Oil the new filter seal and fit it by hand.
Change the reservoir breather cap.
Start the engine, check for leaks, lower the arms and top up the reservoir to the mark.

Tools: Filter wrench, Drain tray, Lint-free rags, Gloves

Hydraulic fluid, filter and case drain filters change

Hydraulics · every 1,000 hours or every year

Bobcat lists replacing the hydraulic reservoir fluid and the drive motor case drain filters (if fitted) every 1,000 hours or 12 months, with the case drain filters also done at 50 hours on a new machine. The main hydraulic filter is changed with the fluid as well. A blocked case drain filter can blow the drive motor shaft seal (see known problems).

Part	Qty	Notes	Part number
Bobcat Hydraulic/Hydrostatic Fluid	1	Early machines ≈32.2 L system / 23 L reservoir; from S/N 512264900 ≈22.7 L system / 13.2 L reservoir. Check your handbook for the drain-and-refill amount	check your handbook
Hydraulic / hydrostatic filter	1	Genuine Bobcat	6661248
Case drain filter element (one per drive motor, if fitted)	2	Genuine Bobcat element for in-line case drain filter 6661022; listed for the 763	6661807
Reservoir breather cap	1	Check your handbook	check your handbook

Step-by-step

Park on firm level ground, lower the lift arms with the bucket flat on the ground, stop the engine and take the key out.
With the engine off, move the lift, tilt and auxiliary controls to let out trapped pressure.
Drain the reservoir into a container. Wear gloves; warm oil can scald.
Change the main filter and the case drain filter elements (the small canisters in the lines from each drive motor back to the tank).
Refit the drain plug and fill with Bobcat Hydraulic/Hydrostatic Fluid to the mark. Do not mix in other fluids.
Start the engine, work the lift and tilt slowly through their travel, lower the arms, stop and top up the reservoir.

Tools: Container for at least 35 L, Spanners, Filter wrench, Funnel or pump, Gloves

Chaincase (final drive) oil change

Final drive · every 1,000 hours or every year

The drive chains run in oil in the chaincase under the cab. Bobcat lists checking the level every 50 hours and replacing the oil every 1,000 hours or 12 months (763/763H service manual).

Part	Qty	Notes	Part number
Chaincase oil	1	≈34 L (36 US qt). Type: check your handbook	check your handbook

Step-by-step

Take the bucket or attachment off first so there is no weight on the arms.
If you need the arms up for access, raise them and fit the lift arm support device before you go near them: Bobcat says never work under raised arms without it. Then stop the engine and take the key out.
Place a large tray under the chaincase. The level plug is at the front of the machine.
Remove the drain plug and let the oil drain fully. If more oil comes out than the chaincase should hold, suspect a leaking drive motor seal.
Refit the drain plug and fill through the filler until oil reaches the level plug.
Refit the plugs, remove the support device, lower the arms and check for leaks.

Tools: Large drain tray (40 L), Spanners, Pump or funnel, Gloves, Jack stands

Engine air filter elements (when the indicator shows)

Engine · when needed

Bobcat says check the air filter condition indicator every 10 hours and service the filter only when the indicator shows it is needed. It also says do not clean the elements with compressed air.

Part	Qty	Notes	Part number
Outer (primary) air filter	1	Genuine Bobcat; Bobcat's parts shop lists the 763. Supersedes 6655888 and 886525B. Fit can vary by serial number and engine, so check with your dealer	6598492
Inner (safety) air filter	1	Genuine Bobcat; Bobcat's parts shop lists the 763. Supersedes Donaldson P123160. Check your serial with the dealer	6598362

Step-by-step

Stop the engine and take the key out. Never run the engine with the filter out.
Open the air cleaner and take out the outer element. Do not blow it out with compressed air: Bobcat says this damages it.
Wipe the inside of the housing with a damp cloth.
Fit the new element, check the seal sits evenly and close the housing. Change the inner element if your handbook calls for it.
Reset the condition indicator if it has a reset button.

Tools: Torch, Damp cloth

Oils, fluids and capacities

System	Oil or spec	Capacity
Engine	Kubota V2203-EB 2.2 L 4-cylinder water-cooled diesel, 46 hp (34 kW) at 2,800 rpm
Engine oil	API CD or better (Bobcat 763/763H service manual schedule). Viscosity: check your handbook.	≈7.1 L (7.5 US qt) with filter
Coolant	Sources disagree: ≈9.3 L (9.8 US qt), or 8.7 L without heater / 9.3 L with heater, or 12.3 L. Coolant type: check your handbook.
Hydraulic / hydrostatic system (shared)	Bobcat Hydraulic/Hydrostatic Fluid (the orange 'Proven Performance' fluid Bobcat lists for the 763)	Up to S/N 512264899: reservoir ≈23 L, system ≈32.2 L. From S/N 512264900: reservoir ≈13.2 L, system ≈22.7 L
Final drive chaincase	Check your handbook	≈34 L (36 US qt / 9 US gal)
Engine oil	Check your handbook	≈7.1 L with filter
Cooling system	Check your handbook	≈9.3 L (sources disagree, see engine)
Fuel tank	Diesel	≈53 L (14 US gal)

Specifications


Engine power	46 hp (34 kW) at 2,800 rpm
Rated operating capacity	680 kg (1,500 lb)
Tipping load	1,360 kg (3,000 lb)
Operating weight	≈2,455 kg (5,410 lb)
Lift path	Radial
Hydraulic pump flow	59 L/min (15.6 US gal/min) standard; 97.8 L/min (25.8 US gal/min) high flow
System relief pressure	207 bar (3,000 psi)
Travel speed	11.3 km/h (7 mph)
Tyres	10.00x16.5 standard; 31x15.5x15 optional

Known problems

Hydraulic oil vanishing into the chaincase

A worn drive motor shaft seal lets hydraulic oil leak into the chaincase, so the tank drops with no oil on the floor. Check by removing the chaincase level plug: if extra oil pours out, the seal is leaking. The motor may need replacing, not just the seal.

Blocked case drain filters

A clogged or restricted case drain filter on the line from each drive motor back to the tank is the usual cause of that shaft seal failing. Clean or change both filters whenever you change a seal.

Transmission warning light

If the transmission warning light stays on for more than 5 minutes once the hydraulic fluid is warm, Bobcat says change the hydraulic/hydrostatic filter early.

Never work under unsupported arms

Bobcat says never work on the machine with the lift arms up unless they are held by the approved lift arm support device. Take the attachment off first.

Repair guides

Hydraulic oil disappearing into the chaincase (drive motor seal and case drain filters) (Hard, Half a day for a seal; a day for a motor): Hydraulic tank level keeps dropping with no oil on the ground, chaincase overfull, oil pours out when the chaincase level plug is removed, drive weak on one side.
Transmission warning light: hydraulic/hydrostatic filter change (Easy, 45 minutes): Transmission warning light stays on more than 5 minutes after the hydraulic oil is warm, sluggish drive, filter not changed for a year.
Fitting and removing the lift arm support device (Easy, 15 minutes): You need to work with the lift arms raised (engine bay, cab tilt, hoses) and want to do it safely.
Drive chains and chaincase: slack, noise and chain replacement (Hard, 1 hour to check; a day to replace chains): Clunk when changing direction, chain slap or rattle from the chaincase, a wheel rocks before the drive takes up, chain jumping a sprocket under load.
Hydrostatic drive owner checks: weak drive, creep and drive belt (Specialist, 1 hour of owner checks): Loader creeps with the controls in neutral, one side weak, drive fades when hot, squeal or slip from the engine-to-pump drive belt.

The full step-by-step guides are in Farmyard Workshop once you add your telehandler.

Sources

Open Farmyard Workshop