# 1974 Caterpillar 12G **URL:** > This machine has been sold or is not currently for sale. ## Listing details - **Price:** Sold - **Listing ID:** 88920268 - **Year:** 1974 - **Manufacturer:** Caterpillar - **Model:** 12G - **Category:** Motor Graders - **Hours:** 4777 - **Serial number:** 61M1954 - **Location:** Los Angeles, Ca - **Auction starts:** 2026-09-15 ## Description Located in Lane 13 Spot 32, Open Operator Station, Differential Lock, 12 ft / 3.66 m Moldboard, Combination Ripper/Scarifier, 15.5 - 25 Tires Closing Time: 2026-09-15 09:11:15 AM ## Manufacturer specifications ### Circle - **Blade Tip Angle - Front:** 90 degrees - **Blade Tip Angle - Rear:** 90 degrees - **Diameter:** 60.3 in (153.16 cm) - **Max Lift Above Ground:** 17.3 in (43.94 cm) - **Max Reach Outside Tires - Left:** 72.1 in (183.13 cm) - **Max Reach Outside Tires - Right:** 73.7 in (187.2 cm) - **Rotation:** 360 degrees ### Dimensions - **Blade Base:** 8.44 ft (2.57 m) - **Height:** 10.75 ft (3.28 m) - **Height To Top Of Isomount Cab:** 10.93 ft (3.33 m) - **Length:** 27.25 ft (8.31 m) - **Overall Length:** 27.27 ft (8.31 m) - **Tandem Axle Wheelbase:** 4.99 ft (1.52 m) - **Weight:** 29860 lbs (13544.28 kg) - **Wheelbase:** 19.43 ft (5.92 m) - **Width:** 7.75 ft (2.36 m) - **Width Over Tires:** 7.91 ft (2.41 m) ### Engine - **Displacement:** 640.8 cu in (10500.85 cu cm) - **Engine Make:** 2236 - **Max Power:** 135 hp (100.67 kw) - **Net Power Gear 5-6:** 135 hp (100.67 kw) - **Number Of Cylinders:** 6 - **Power Measured @:** 2200 rpm ### Front Axle - **Ground Clearance:** 2.1 ft (0.64 m) - **Oscillation - Total:** 32 degrees - **Wheel Lean:** 18 degrees ### Hydraulic System - **Pump Flow:** 51 gpm (193.04 lpm) - **Pump Type:** closed-center, constant-pressure system w/ variable displacement piston - **Relief Valve Pressure:** 2150 psi ### Moldboard - **Max Depth Of Cut:** 17.8 in (45.21 cm) - **Moldboard Height:** 24.1 in (61.21 cm) - **Moldboard Thickness:** 0.9 in (2.29 cm) - **Moldboard Width:** 12 ft (3.66 m) - **Side Shift Left:** 26.4 in (67.06 cm) - **Side Shift Right:** 20.5 in (52.07 cm) ### Operational - **Alternator Supplied Amperage:** 19 amps - **Cooling System Fluid Capacity:** 12.5 gal (47.31 l) - **Fuel Capacity:** 74.8 gal (283.12 l) - **Hydraulic System Fluid Capacity:** 20.1 gal (76.08 l) - **Max Operation Weight - Front Axle:** 9987 lbs (4530.03 kg) - **Max Operation Weight - Rear Axle:** 21605.4 lbs (9800.06 kg) - **Max Operation Weight - Total:** 31592.3 lbs (14330.04 kg) - **Oil System Fluid Capacity:** 7.7 gal (29.14 l) - **Operating Voltage:** 24 V - **Std Operation Weight - Front Axle:** 7870.6 lbs (3570.05 kg) - **Std Operation Weight - Rear Axle:** 20128.3 lbs (9130.05 kg) - **Std Operation Weight - Total:** 27998.8 lbs (12700.06 kg) - **Tandem Case Fluid Capacity (Each):** 17 gal (64.35 l) - **Transmission Fluid Capacity:** 23 gal (87.06 l) ### Steering - **Articulation Angle:** 50 degrees - **Turning Radius:** 24 ft (7.32 m) ### Transmission - **Max Speed - Forward:** 25.5 mph (41.04 kph) - **Max Speed - Reverse:** 25.5 mph (41.04 kph) - **Number Of Gears - Forward:** 6 - **Number Of Gears - Reverse:** 6 - **Transmission Type:** Cat-built direct drive power shift ## About this model The Caterpillar 12G is a motor grader designed for grading, leveling, ditching, and road maintenance applications. Built as part of Caterpillar's G-series lineup, the 12G is commonly used in construction, mining, and municipal work where precise blade control and reliable traction are required. It features a mid-size frame, articulated steering, and a moldboard system suited for fine grading and surface shaping. The 12G is known for mechanical simplicity, serviceability, and durable components. As a used equipment model, it remains relevant in fleets needing a dependable grader for earthmoving, site preparation, and maintenance tasks. ## Photos ![1974 Caterpillar 12G](https://www-ironplanet.s3-us-west-2.amazonaws.com/i/22628/127/f6f25ef7-f522-4871-ad61-ead3646e0cb9-hr.jpg) ![1974 Caterpillar 12G photo 2](https://www-ironplanet.s3-us-west-2.amazonaws.com/i/22628/127/4d40a18a-eec4-4cfa-8650-59d365de6522-hr.jpg) ![1974 Caterpillar 12G photo 3](https://www-ironplanet.s3-us-west-2.amazonaws.com/i/22628/127/7ead6749-130e-43e3-9607-59518a16ca0b-hr.jpg) ![1974 Caterpillar 12G photo 4](https://www-ironplanet.s3-us-west-2.amazonaws.com/i/22628/127/7af8ed5f-e8f4-4d04-9c2f-27ef293f45e2-hr.jpg) ![1974 Caterpillar 12G photo 5](https://www-ironplanet.s3-us-west-2.amazonaws.com/i/22628/127/8ea4a914-add6-43d6-88fa-574b11a559ce-hr.jpg) ![1974 Caterpillar 12G photo 6](https://www-ironplanet.s3-us-west-2.amazonaws.com/i/22628/127/853aff3e-e997-4206-833d-81e0b3804d56-hr.jpg) ![1974 Caterpillar 12G photo 7](https://www-ironplanet.s3-us-west-2.amazonaws.com/i/22628/127/f9b7abe2-f0de-4e69-a028-912fadf4326f-hr.jpg)