Boom at Boom and Dipper Cylinder Base Bushing for Cat 420E 432E 434E | 220-1012

Fits Models At A Glance:

• Caterpillar Backhoe Loaders - E Series: 420E, 432E, 434E
• Caterpillar Backhoe Loaders - F Series: 420F

Serial Number Notes:

• Check the three character prefix on your machine data plate: the models below split by prefix
• 420E: KMW, HLS, PHC, PRA, DAN, DJL
• 420F: SKR on the standard machine, JWJ on the integrated toolcarrier, LKH
• 432E: JBA, BXE, RXS
• 434E: SXB, FSH, SJL
• Four models only - read the suffix carefully: The 420F2, 432F and 434F are NOT covered, and neither are the 416E, 422E, 428E, 430E, 442E or 444E. The 420F and the 420F2 are not the same machine.

Key Notes:

• Part Number: 220-1012 (Caterpillar reference 220-1012)
• Weight: 1.35 lbs
• Application: Boom at the boom and dipper cylinder base pin - the bushing that protects the boom weldment where pin 213-6693 carries the base ends of both the boom cylinder and the dipper cylinder
• Location: Backhoe end, in the boom casting. The bushings inside the cylinder eyes on this same pin are different parts - 212-8960 in the boom cylinder, 215-1906 in the dipper cylinder.
• Dimensions: 70.33 mm inside diameter, 83.135 mm outside diameter, 49 mm long
• Style/Type: Plain straight sleeve - no grease hole, no external groove, no cross holes. That is the fastest way to tell it from its two same-size siblings, which are grooved because they take the grease inside the cylinder eye.
• Measure Before Ordering: Two Caterpillar bushings share this exact 70.33 mm bore and 83.135 mm outside diameter - 215-1906 is 35 mm long and 212-8960 is 47 mm long with cross holes and an external groove. This one is 49 mm and plain.
• Interchange Numbers: Mates Caterpillar linkage pin 213-6693, 70 mm diameter by 312 mm long
• Serial Number Notes: Confirm the prefix on your machine data plate. Only four models are covered and the F2 machines are not among them.
• Material: Steel, low alloy
• Condition: Aftermarket replacement part
• Shipping Restrictions: Ships within the lower 48 United States only

Common Use Case or Symptoms:

Use when the boom knocks at the cylinder base pin under load, when the 70 mm pin has picked up a wear step, or when the bushing has spun in the boom casting. Both cylinder bases hang on this one pin, so a worn bore lets the boom and the dipper shudder together, and the casting is the expensive part to save.

Why Choose Broken Tractor?

• ✅ One Pin Carries Both Cylinders: The boom cylinder and the dipper cylinder both anchor on pin 213-6693, and this sleeve is what keeps that bore from wallowing out of the boom.
• ✅ Plain Sleeve Not The Grooved One: No grease hole, no external groove, no cross holes - the tell that separates it from 212-8960, which measures the same and is only 2 mm shorter.
• ✅ Four Machines Named Exactly: 420E, 420F, 432E and 434E with prefixes. We do not stretch it across the F2 machines the way broad-family listings do.