Lambro 550N, 550A and 500ML

Lambro 550N

Italian Production Dates: April 1967 - March 1969
Frame Prefix: N-M42/2

'Lambro 550N helps you work'

The Lambro 550N, launched in 1967 was the first of the Lambro models with the engine outside of the cabin. This reduced the noise, vibration and heat created by having the engine under the seat. Slight cosmetic changes were made to the cab such as the removal of the enlarged horn cover plate in the centre which was replaced with a 550N badge similar to those used on the Lambro 175, 200 and 450 models. Window hinges changed from two small hinges to a strip hinge running down the window. A 'front air intake' was added to the front of the cabin in the form of a flap to allow air in.

The three point engine mountings from the earlier models were replaced by 4 rubber buffers as engine mountings, supported by a solid cradle under the engine. The new location for the engine meant accessing it for general maintenance became a problem unless the back was removed. To overcome this, a removable inspection panel was inserted on the lower half of the back of the cabin, meaning if the seat was removed, and the panel, the engine could be accessed. Rubber drive couplings were upgraded to larger versions. The rear axle changed in design to move the differential to accomodate the new engine position. Leaf springs were also changed.

Overall Dimensions

Maximum Length:	Open Body Type: 3100mm	Maximum height:	Open Body: 1670mm
	Closed Body Type: 2915mm		Box Body: 1715mm
Maximum width :	Open Body Type: 1510mm	Track width:	1216mm
	Closed Body Type: 1380mm	Wheelbase:	1970mm
Ground Clearance:	145mm

 

Frame and Cabin

Frame	Tubular Steel backbone with a single sheet floor plate welded directly to it. Support beams in bent sheet steel and cradle for support of engine. Cradle for spare wheel
Front suspension:	by means of rocker arms connected to levers with end balls compressing through guide pistons two variable pitch helical springs. Telescopic hydraulic shock absorbers.
Rear suspension:	with two longitudinal leaf springs anchored to the frame at the front and shackled at the rear. Telescopic hydraulic shock absorbers.
Cabin:	pressed steel, equipped with rear window, complete with instrument panel, holes for attaching the door hinges, rear-view mirror.
Windscreen:	curved windscreen mounted on rubber gasket
Windscreen Wiper:	Electric wiper
Interior Light	Roof Mounted
Seat:	Double seat bench
Doors:	Doors (accessory) complete with glass windows (left hand door with normal type lock, right hand door with locking device in handle).

 

Wheels and Brakes

Wheels	Interchangeable wheels	Tyres:	front: 4.50 x 10T (6 P.R.)
	Single piece automobile type rims in pressed steel.		rear: 4.50 x 10T (6 P.R.) (T mark indicated heavy tread tyres for commercial use)
Brakes: Internal expansion brakes.	mechanically controlled by lever on the right handlebar for the front brake - foot operated hydraulic rear brakes	Tyre pressures at full load:	Front: 2.5 kg/cm square
	Hand lever parking brakes on rear wheels.		Rear: 3.75 kg/cm square

 

Rear Axle:

Consisting of:	central differential box:
	rear axle housing
	sliding half-shafts easily withdrawn by removal of wheel flange

 

Electrical Equipment

The dynamotor, nominal power 90W, powers the 12V-25Ah battery, through the regulator

The user circuits are protected by 7 fuses (8A each), arranged below the dashboard.

The direction indicators flasher unit and the electrical wiper switch are live only with the ignition switched on (ie key and switch on the dashboard in the positions 1,2,3)

The horn and rear stop lights can be operated without ignition key inserted.

The red indicator bulb on the dashboard comes on with the ignition on and stays on with the engine running. Should turn off when the ignition is switched off

 

Position	Use	Number	Features
			Electrical	Type of Bulb	Type of Fitting
Headlight	Dual Filament. Full beam/dipped (symmetric)	2	12V-35/35W	Spherical	BA 20d
Front Side Lights	Parking	2	?	Spherical	BAY 15d / 19
	Front Indicators	2	?	Spherical	BA 9s
Rear Side Lights	Parking	2	12V - ?	Festoon	S 8.5 / 9.5
	Brake	2	12V - 10W	Festoon	S 8.5 / 9.5
	Rear indicators	2	12V - 10W	Festoon	S 8.5 / 9.5
Dashboard	Ignition	1	12V - 3W	Festoon	S 7/8
	Indicators	1	12V - 3W	Festoon	S 7/8
	Lights on	1	12V - 3W	Festoon	S 7/8
	Full beam on	1	12V - 3W	Festoon	S 7/8
Interior Light	Illumination of cabin	1	12V - 5W	Festoon	S 8.5 / 9.5
	Illumination of closed box	1	12V - 5W	Festoon	S 8.5 / 9.5
Speedometer (accessory)	Illumination of speedo	1	12V-3W	Cylindrical	BA 9s

Engine

Engine:	Single cylinder two stoke, forced air cooled.	Carburettor	Dell’Orto SH1/20 – Cartridge type air filter
Bore:	66mm	Max. Jet:	92
Stroke:	58mm	Idle / Pilot Jet:	50
Capacity:	198cc	Starter Jet:	55
Compression Ratio:	7.25	Atomizer:	5914.01
Output:	at 4,800 r.p.m.:  9.2HP

Ignition	flywheel alternator, battery, external HT coil. Fixed advance
Clutch:	Multi-disc type in oil bath
Gear Box:	gearbox with four speeds and reverseconstant mesh gears ,alternately splined to the secondary shaft by coupling sliders
Total transmission ratios (Rear Wheel RPM/ENGINE RPM)	1st gear: 1/41.4
	2nd gear: 1/21.4
	3rd gear: 1/13.5
	4th gear: 1/8.1
	Reverse: 1/44.3
Transmission	From engine to gearbox: by gears with flexible coupling.
	From gearbox to rear axle: by hollow shaft with splined couplings and two flexible couplings

 

Performance

Dry Weight inc doors, without spare wheel.	Open Type Body:385kg	Useable height of body (box type)	1025mm
	Box Type body:390kg	Maximum permissible total weight (dry weight + accessories & fuel + crew + load)	1005kg
Useable length of Body	Open Type Body: 1700mm	Max. pay load	Open Body: 550kg
	Box Type body: 1550mm		Closed Body: 545kg
Useable width of body	Open Type Body: 1480mm	Max Speed at full load on flat roads	58.3km/h
	Box Type body: 1350	Tank Capacity:	11.5 litres
Min. Turning Radius:	2825mm	Range:	220km
Consumption CUNA (lt)6.2x 100/km

 

Documents and Pictures

Lambro 550A

Italian Production Dates: February 1968 - February 1969
Frame Prefix: A-M42/2

 

 

The 550A was launched in February 1968. It was identical to the 550N with the exception of its length. The pick-up box was longer than the 550N to accomodate a larger load volume and had a tipping liftable load. It could carry the same weight as the 550N although the additional versatility was an important selling point. Production figures for the 550A were 19% greater than that of the 550N for the period they were produced together.

Technical Characteristics are the same as the 550N - dimensions and weight vary slightly

DIMENSION AND WEIGHTS - ONLY OPEN BODY
Overall Length (m): 3.225	Width (m): 1.510
Maximum Height (m) 1.670	Loading Floor Height (m) 0.650
Body Length (m) 1.850	Body width (m) 1.480
Weight (kg) 385	Maximum Weight (kg): 1005
Performance and Fuel Consumption Maximum Speed (km/h) 58.3 Consumption CUNA (lt)6.2x 100/km

 

Documents and Pictures

Lambro 500L

Production Dates: February 1968 - February 1969
Frame Prefix: M41/3-A

 

 

The 500L was a lighter, smaller, cheaper and less powerful version of the 550N featuring the smaller engine size of 175cc and a lower carrying capacity of 500kg

 

Overall Dimensions

Maximum Length:	Open Body Type: 2950mm	Maximum height:	1670mm
	Closed Body Type: 2915mm
Maximum width :	Open Body Type: 1440mm	Track width:	1216mm
	Closed Body Type: 1380mm	Wheelbase:	1970mm
Ground Clearance:	145mm

 

Frame and Cabin

Frame	Tubular Steel backbone with a single sheet floor plate welded directly to it. Support beams in bent sheet steel and cradle for support of engine.
Front suspension:	by means of rocker arms connected to levers with end balls compressing through guide pistons two variable pitch helical springs. Telescopic hydraulic shock absorbers.
Rear suspension:	with two longitudinal leaf springs anchored to the frame at the front and shackled at the rear. Telescopic hydraulic shock absorbers (accessories)
Cabin:	pressed steel, equipped with rear window, complete with dashboard, holes for attaching the door hinges, rear-view mirror.
Windscreen:	curved windscreen mounted on rubber gasket
Windscreen Wiper:	Electric wiper
Interior Light	Roof Mounted
Sunvisor	Sunshade
Seat:	Double seat bench
Doors:	Doors (accessory) complete with glass windows (left hand door with normal type lock, right hand door with locking device in handle).

 

Wheels and Brakes

Wheels	Interchangeable wheels	Tyres:	front: 4.50 x 10T (4 P.R.)
			rear: 4.50 x 10T (6 P.R.) (T mark indicated heavy tread tyres for commercial use)
Brakes: Internal expansion brakes.	mechanically controlled by lever on the right handlebar for the front brake - foot operated hydraulic rear brakes	Tyre pressures at full load:	Front: 2.25 kg/cm square
	Hand lever parking brakes on rear wheels.		Rear: 3.25 kg/cm square

 

Rear Axle:

Consisting of:	central differential box:
	rear axle housing
	sliding half-shafts easily withdrawn by removal of wheel flange

 

Electrical Equipment

The dynamotor powers the 12V-25Ah battery, through the regulator.

The user circuits are protected by 7 fuses (8A each), arranged below the dashboard.

The direction indicators flasher unit and the electrical wiper switch are live only with the ignition switched on (ie key and switch on the dashboard in the positions 1,2,3)

The horn and rear stop lights can be operated without ignition key inserted.

The red indicator bulb on the dashboard comes on with the ignition on and stays on with the engine running. Should turn off when the ignition is switched off

 

Position	Use	Number	Features
			Electrical	Type of Bulb	Type of Fitting
Headlight	Dual Filament. Full beam/dipped (symmetric)	2	12V-35/35W	Spherical	BA 20d
Front Side Lights	Parking	2	12V - 5/20w	Spherical	BAY 15d / 19
	Front Indicators	2	12V - 3W	Cylindrical	BA 9s
Rear Side Lights	Parking	2	12V - 5W	Festoon	S 8.5 / 9.5
	Brake	2	12V - 10W	Festoon	S 8.5 / 9.5
	Rear indicators	2	12V - 10W	Festoon	S 8.5 / 9.5
Dashboard	Ignition	1	12V - 3W	Festoon	S 7/8
	Indicators	1	12V - 3W	Festoon	S 7/8
	Lights on	1	12V - 3W	Festoon	S 7/8
	Full beam on	1	12V - 3W	Festoon	S 7/8
Interior Light	Illumination of cabin	1	12V - 5W	Festoon	S 8.5 / 9.5
	Illumination of closed box	1	12V - 5W	Festoon	S 8.5 / 9.5
Speedometer (accessory)	Illumination of speedo	1	12V-3W	Cylindrical	BA 9s

Engine

Engine:	Single cylinder two stoke, forced air cooled.	Carburettor	Dell’Orto SH1/20 – Cartridge type air filter
Bore:	62mm	Max. Jet:	88
Stroke:	58mm	Idle / Pilot Jet:	50
Capacity:	175cc	Starter Jet:	55
Compression Ratio:	7.10	Atomizer:	5914.01
Output:	at 4,800 r.p.m.:  8.45HP

Ignition	flywheel alternator, battery, external HT coil. Fixed advance
Clutch:	Multi-disc type in oil bath
Gear Box:	gearbox with four speeds and reverseconstant mesh gears ,alternately splined to the secondary shaft by coupling sliders
Total transmission ratios (Rear Wheel RPM/ENGINE RPM)	1st gear: 1/41.4
	2nd gear: 1/21.4
	3rd gear: 1/13.5
	4th gear: 1/8.1
	Reverse: 1/44.3
Transmission	From engine to gearbox: by gears with flexible coupling.
	From gearbox to rear axle: by hollow shaft with splined couplings and two flexible couplings

 

Performance

Dry Weight inc doors, without spare wheel.	Open Type Body:385kg	Useable height of body (box type)	990mm
	Box Type body:390kg	Maximum permissible total weight (dry weight + accessories & fuel + crew + load)	950kg
Useable length of Body	Open Type Body: 1470mm	Max. pay load	Open Body: 500kg
	Box Type body: 1410mm		Closed Body: 490kg
Useable width of body	Open Type Body: 1345mm	Max Speed at full load	60.9km/h
	Box Type body: 1280	Tank Capacity:	11.5 litres
Min. Turning Radius:	2825mm	Range:	230km
Consumption CUNA (lt) 4.97x 100/km

Documents and Pictures