Harley-Davidson · Harley-Davidson Panhead (1948-1965)

EL / FL Panhead (springer, rigid)

Library entry covers 1948

31 factory 42 guideline

Published source

Harley-Davidson Panhead Service Manual 1948-1957 Rigid (reprint of factory service manual; Regular Lubrication and Service Intervals Chart)

Factory workshop manual. Covers 1948.

Open the source

73 items for a 1948 model, grouped by interval the way a factory chart is laid out.

How this bike is built (what the schedule is based on)

Engine cycle: Four-stroke
Engine lubrication: Dry sump (separate oil tank)
Oil filtration: None (no filter)
Valve gear: Hydraulic lifters (no routine clearance adjustment)
Ignition: Battery and coil with contact points
Charging: DC generator with regulator
Battery: Wet cell (flooded lead-acid, needs topping up)
Fuel system: Single carburetor
Cooling: Air / oil cooled
Primary drive: Chain fed by engine oil / breather (no separate oil change)
Gearbox oil: Separate gearbox oil
Clutch control: Foot clutch / hand shift
Final drive: Chain
Front suspension: Springer fork
Rear suspension: Rigid (hardtail)
Front brake: Drum (or band / stirrup)
Rear brake: Drum (or band / belt rim)
Wheels: Spoked, tubed
Sidecar: No sidecar

Maintenance schedule

1948 Harley-Davidson EL / FL Panhead (springer, rigid)

On the road: every 200 mi

1 item

Check engine oil level

Pre-ride / on the road

Guideline

Each fuel stop on old machines. Dry sump: check the tank hot, engine idling or just stopped, per your manual.

On the road: every 300 mi

2 items

Check lights, horn, brake light switches

Pre-ride / on the road

Guideline
Check tire pressures

Pre-ride / on the road

Guideline

On the road: every 500 mi

2 items

Grease girder / springer fork links

Pre-ride / on the road

Guideline

Grease gun on every nipple until clean grease shows. Touring days add up fast.
Walk-around: check nuts and bolts for vibration loosening

Pre-ride / on the road

Guideline

Old machines shake things loose: exhaust nuts, mudguard stays, footrests, tank mounts, battery strap.

On the road: every 600 mi

1 item

Check chain slack and rear wheel alignment

Pre-ride / on the road

Guideline

On the road: every 1,000 mi

2 items

Check road kit: plugs, points file, master link, tube patches, wire, tape

Pre-ride / on the road

Guideline
Lubricate drive chain

Pre-ride / on the road

Factory

Manual: Rear chain (oil). Factory: PDF p9 chart: oil rear chain every 1,000 mi; rear chain oiler checked 2,000 mi

Every 1,000 mi or 6 months

2 items

Adjust front drum brake

Brakes

Guideline
Check spoke tension and wheel true

Wheels and tires

Guideline

Every 1,000 mi

12 items

Check throttle cable(s) free play and return

Fuel and air

Factory

Manual: Throttle control cable / spiral. Factory: PDF p9: oil cable 1,000 mi; grease throttle spiral 5,000 mi/1 yr
Clean / inspect air filter

Fuel and air

Factory

Manual: Air cleaner (service). Factory: PDF p9 (printed p8) chart, 1,000 mile service column; replace at 5,000 mi/1 yr
Check battery electrolyte, top up with distilled water

Ignition and electrics

Factory

Manual: Battery. Factory: PDF p9 chart: battery at 1,000 mi; also Check Battery weekly
Lubricate manual advance / retard control and cable

Ignition and electrics

Factory

Manual: Spark control cable / spiral. Factory: PDF p9: oil cable 1,000 mi; grease spark control spiral 5,000 mi/1 yr
Oil / check generator bearings (where an oiler is fitted)

Ignition and electrics

Factory

Manual: Generator bearing / commutator end bearing. Factory: PDF p9: oil generator bearing 1,000 mi; p13 item 15: pack end bearing 5,000 mi/1 yr
Adjust foot clutch and hand-shift linkage, lubricate pivots

Primary and gearbox

Factory

Manual: Foot clutch pedal, hand clutch booster, shifter joints. Factory: PDF p9 chart: grease/oil every 1,000 miles
Check gearbox oil level

Primary and gearbox

Factory

Manual: Check transmission oil level. Factory: PDF p13 item 22: every two weeks or every 1000 miles, whichever first
Rear chain adjustment

Final drive

Factory

Factory: PDF p9 chart: every 1,000 miles (key nearest: rear chain adjust)
Check footrests, pegs, rear brake and gear lever pivots

Rear suspension and frame

Factory

Manual: Rear brake pedal, foot shift lever bearings. Factory: PDF p9 chart: grease every 1,000 miles
Grease saddle pivot, check saddle springs / seat post

Rear suspension and frame

Factory

Manual: Saddle post, saddle bar bearing, saddle post roller. Factory: PDF p9 chart: grease/oil every 1,000 miles
Check wheel bearings for play

Wheels and tires

Factory

Manual: Front/rear wheel hub thrust bearings (grease). Factory: PDF p9 chart: hub thrust bearings 1,000 mi; hub centers 5,000 mi/1 yr
Lubricate control cables and lever pivots

Controls and cables

Factory

Manual: Clutch/brake hand levers, control cables. Factory: PDF p9 chart: oil levers, clutch, front brake, throttle, spark cables every 1,000 mi

Every 1,500 mi or 6 months

1 item

Clean drive chain thoroughly (remove and soak, re-lube)

Final drive

Guideline

Non O-ring chains on old machines: remove, clean, soak in hot chain grease or lube, refit with the master link clip closed end leading.

Every 2,000 mi or 12 months

2 items

Change gearbox oil

Primary and gearbox

Guideline
Check springer rocker stud play and spring condition

Front end

Guideline

Every 2,000 mi

9 items

Change engine oil

Engine

Factory

Manual: Drain engine oil tank and refill. Factory: PDF p13 (printed p12) item 19: at least every 2000 mi; oftener dusty/winter
Clean oil strainers / mesh screens

Engine

Factory

Manual: Tappet oil screen. Factory: PDF p9 chart: every 2,000 miles
Inspect, clean and gap spark plugs

Engine

Factory

Manual: Spark plugs. Factory: PDF p9 chart: every 2,000 miles
Replace oil filter

Engine

Factory

Manual: Oil filter (service). Factory: PDF p9 chart: 2,000 mi; replace oil filter every 5,000 mi or 1 yr
Clean fuel tap filter / sediment bowl

Fuel and air

Factory

Manual: Fuel strainer. Factory: PDF p9 chart: every 2,000 miles
Clean and gap contact breaker points, oil cam felt

Ignition and electrics

Factory

Manual: Circuit breaker. Factory: PDF p9 chart: 2,000 mi; circuit breaker cam grease 1,000 mi (p13)
Check / adjust primary chain

Primary and gearbox

Factory

Manual: Front chain adjustment. Factory: PDF p9 chart: every 2,000 miles; front chain oiler also 2,000 mi
Check primary chain oil supply (breather / pump feed)

Primary and gearbox

Factory

Manual: Front chain oiler. Factory: PDF p9 chart: every 2,000 miles
Check chain guard, chain oiler (if fitted), rear chain case

Final drive

Factory

Manual: Rear chain oiler. Factory: PDF p9 chart: every 2,000 miles

Every 3,000 mi or 12 months

7 items

Check engine mounting bolts and plates

Engine

Guideline
Check generator drive belt or chain

Ignition and electrics

Guideline
Adjust clutch pushrod / clutch adjuster

Primary and gearbox

Guideline
Inspect chain and sprockets for wear (measure stretch)

Final drive

Guideline
Check steering damper (friction or hydraulic)

Front end

Guideline
Check steering head bearing adjustment

Front end

Guideline
Grease and check center / side stand and springs

Rear suspension and frame

Guideline

Every 4,000 mi or 12 months

2 items

Replace spark plugs

Engine

Guideline
Lubricate brake cam spindles, check linings and drums

Brakes

Guideline

Every 5,000 mi or 12 months

7 items

Replace air filter element

Fuel and air

Factory

Manual: Replace air cleaner. Factory: PDF p9 chart: every 5,000 miles or 1 year, whichever first
Check / set ignition timing

Ignition and electrics

Factory

Manual: Time ignition. Factory: PDF p9 chart: every 5,000 miles or 1 year
Lubricate and check automatic advance unit

Ignition and electrics

Factory

Manual: Circuit breaker camshaft (grease). Factory: PDF p9 chart: grease every 5,000 miles or 1 year
Change fork oil

Front end

Factory

Manual: Hydraulic fork. Factory: PDF p9 chart: hydraulic fork service every 5,000 miles or 1 year
Adjust rear drum brake and rod / cable linkage

Brakes

Factory

Manual: Adjust brakes. Factory: PDF p9 chart: every 5,000 miles or 1 year
Inspect tire tread, sidewalls and date codes

Wheels and tires

Factory

Manual: Switch tires. Factory: PDF p9 chart: switch tires every 5,000 mi/1 yr; check tires weekly
Repack / replace wheel bearings

Wheels and tires

Factory

Manual: Front/rear/sidecar wheel hub (center) grease. Factory: PDF p9 chart: every 5,000 miles or 1 year

Every 5,000 mi or 2 years

3 items

Check cylinder head bolt torque

Engine

Guideline

Air-cooled iron and alloy engines can lose head bolt tension; follow your manual's sequence and whether it is done hot or cold.
Clean hydraulic lifter oil screens

Engine

Guideline
Flush oil tank and clean tank screen

Engine

Guideline

Every 6,000 mi or 12 months

3 items

Clean carburetor float bowl(s), check float level and jets

Fuel and air

Guideline

Ethanol fuel varnishes old carbs quickly in storage.
Check charging voltage and regulator / cut-out

Ignition and electrics

Guideline
Inspect generator brushes and commutator

Ignition and electrics

Guideline

Every 6,000 mi or 2 years

1 item

Check engine breather and oil return

Engine

Guideline

Every 8,000 mi or 3 years

1 item

Decarbonize head, grind / lap valves (top-end decoke)

Engine

Guideline

Period practice. Leaded-era valve seats may need hardened seats for unleaded fuel.

Every 10,000 mi or 2 years

1 item

Compression test (or leak-down)

Engine

Guideline

Every 10,000 mi

1 item

Replace chain and sprockets (wear based)

Final drive

Guideline

Every 12,000 mi or 3 years

1 item

Replace points and condenser

Ignition and electrics

Guideline

Every 15,000 mi or 5 years

1 item

Inspect clutch plates and springs

Primary and gearbox

Guideline

Every 15,000 mi

2 items

Replace brake linings / skim drums (wear based)

Brakes

Guideline
Lubricate speedometer / tachometer cables, check drive

Controls and cables

Factory

Manual: Lubricate speedometer core. Factory: PDF p13: every 15,000 miles

Every 50,000 mi

1 item

Repack / replace steering head bearings

Front end

Factory

Manual: Repack steering head bearings. Factory: PDF p9 chart and p13 item 20: every 50,000 mi, grade A grease

Every 6 months

1 item

Clean battery terminals, check charge and strap

Ignition and electrics

Guideline

Every 12 months

1 item

Check speedometer / odometer against a known distance

Controls and cables

Guideline

Old speedos drift with tire size and drive wear. Use phone GPS over a measured 10 miles / km.

Every 2 years

3 items

Inspect fuel tank for rust, sealer failure, leaks

Fuel and air

Guideline
Inspect wiring, bullet connectors and ground points

Ignition and electrics

Guideline
Inspect frame, welds and lugs for cracks

Rear suspension and frame

Guideline

Every 4 years

1 item

Replace fuel lines

Fuel and air

Guideline

Old rubber and modern ethanol fuel do not mix well.

Every 6 years

2 items

Replace inner tubes and rim tape with tires

Wheels and tires

Guideline
Replace tires on age (regardless of tread)

Wheels and tires

Guideline

Guideline lines: Intervals here are general guidelines for the machine's era and layout, compiled for this app. They are not factory manual figures. Check your workshop manual, and edit any interval in the bike's Schedule tab.