John Deere 4630 Tractor Specs (1973-1977)

John Deere 4630 Quick Answers

• Production years and serial startsJohn Deere built the 4630 from 1973 through 1977. Published year-start serials are 1000 for 1973, 7022 for 1974, 11717 for 1975, 18392 for 1976, and 25794 for 1977.
• EngineThe 4630 uses a turbocharged, direct-injection 404 cu in six-cylinder diesel with a 4.25 x 4.75 in bore and stroke, 15.5:1 compression, and 1-5-3-6-2-4 firing order.
• Tested PTO horsepowerNebraska Test 1113 recorded 150.66 PTO hp at the 2,200-rpm rated engine speed for the tested diesel Power Shift 2WD tractor. It is a configuration-specific result, not a generic result for every 4630.
• Tested drawbar horsepowerTest 1113 recorded 127.92 maximum drawbar hp in fourth gear and a maximum pull of 14,478 lb in third gear for the tested Power Shift 2WD tractor.
• Transmission choicesPublished 4630 choices are 8-forward/2-reverse Syncro-Range, 16-forward/6-reverse Quad-Range, and 8-forward/4-reverse Power Shift. Confirm the installed transmission before ordering parts or choosing procedures.
• Engine oil and coolant capacitiesPublished service data lists 17 US qt of engine oil and a 36 US qt cooling system. Oil grade, change interval, and modern fluid equivalents remain held until a complete serial-matched operator manual is reviewed.
• Hydraulic systemThe 4630 uses a closed-center, constant-pressure hydraulic system. The reviewed operator-manual excerpt specifies 2,250 psi standby pressure and identifies power steering, brakes, implement control, and transmission lubrication as hydraulic functions.
• Electrical systemThe tractor is a 12-volt negative-ground system using two 6-volt Group 5D batteries. The battery voltage describes each battery, not a six-volt tractor electrical system.
• Shipping weightThe operator-manual excerpt lists 12,465 lb for an open or Roll-Gard tractor and 13,365 lb with Sound-Gard, both without fuel or ballast. Optional equipment, tires, drive, and transmission change actual weight.
• Are the linked manuals complete?No. The linked files are a 10-page OMR65495 operator-manual excerpt, an 18-page TM-1172 technical-manual excerpt, and a 54-page PC-1296 parts-catalog excerpt. They do not support claims from pages that are not shown.

Engine and Power

The reviewed TM-1172 excerpt identifies a turbocharged, direct-injection 404 cu in six-cylinder diesel with 15.5:1 compression, 4.25 x 4.75 in bore and stroke, and a 1,500-2,200 rpm working range. Test 1113 power remains attached to the tested Power Shift 2WD tractor.

Transmission

The 4630 was published with three distinct transmission families: 8F/2R Syncro-Range, 16F/6R Quad-Range, and 8F/4R Power Shift. PC-1296 confirms parts coverage for all three; Nebraska Test 1113 covers only Power Shift.

PTO and Hitch

The rear PTO is independent and operates at 1,000 rpm. The 150.66 hp figure below is Test 1113's result at 2,200 engine rpm for a Power Shift 2WD tractor, not a model-wide result for every transmission.

Hydraulics

The operator-manual excerpt describes a closed-center, constant-pressure system with 2,250 psi standby pressure. Hydraulic power serves steering, wet-disc brakes, implement control, and transmission and differential lubrication.

Fluids, Battery, and Service Facts

Published capacities include 17 US qt of engine oil, 36 US qt of coolant, and 65 US gal of diesel fuel. Complete oil-viscosity tables, service intervals, filter numbers, and modern equivalents remain held because the linked operator file is only a ten-page excerpt.

Tires and Dimensions

The operator-manual excerpt lists a 112-5/8 in wheelbase, 171-1/4 in overall length, 10.00-16 front tires, and 20.8-38 rear tires for its reference configuration. Cab, axle, tire, drive, transmission, ballast, and equipment choices change working dimensions and weight.

Configuration-specific values are split out where the same model has documented differences by engine, transmission, or equipment.

Electrical

The 4630 is a 12-volt negative-ground tractor with two 6-volt Group 5D batteries. The operator-manual excerpt lists a 55-amp alternator with Sound-Gard or 37 amps without it, so the former generic six-volt card has been replaced with complete system context.

Serial Number Lookup

Published year-start serials run from 1000 in 1973 to 25794 in 1977. The secondary serial guide places the tractor plate at the rear on the right side above the PTO shaft; confirm the complete serial before ordering transmission, PTO, axle, hydraulic, or cab parts.

Manuals and Documents

The three Jensales files are excerpts: ten pages from OMR65495, eighteen pages from the three-volume TM-1172, and fifty-four pages from PC-1296. Only facts visible in those reviewed excerpts are used above.

The University of Nebraska item identifies Test 1113 as the John Deere 4630 Power Shift Diesel. Numeric performance values are labelled as a reviewed secondary transcription until the complete official test PDF can be read directly.

Parts Checks Before Ordering