Calliper Main Piston
MM1975/1
Product details
Diameter = Ø 76.29 Length = 23.7
Replacement calliper pistons and associated dimensions.
19 product lines · ManuMark 2026 catalogue
Fitting notice: Air brake components must be fitted by a qualified technician and matched to your vehicle’s exact part number.
19 products

Diameter = Ø 76.29 Length = 23.7

Diameter = Ø 38 Length = 38

Diameter = Ø 48.1 Length = 20.3

Diameter = Ø 57.9 Length = 42

Diameter = Ø 85 Length = 45.5 KNOTT Calliper BELL B35D B40D For KIT see MM33095 & MM33095 Lean

Diameter = Ø 74.8 Length = 39.2 Goes with MM66011/B

Diameter = Ø 76.1 Length = 48.7 BELL B30 BELL B25 (218439) For KIT see MM33089 or MM33089/B ROCKWELL 4 Pistons per Kit

Diameter = Ø 84.9 Length = 47.5 BELL CALLIPER For KIT see MM33095 or MM33095/B

Diameter = Ø 66.6 Length = 55.6

Diameter = Ø 70 Length = 40

Diameter = Ø 66.7 Length = 54.9 See MM3621/1 for the Seal Kit

Diameter = Ø 66.9 Length = 46

Diameter = Ø 92 Length = 61.1

Diameter = Ø 79.3 Length = 49.3 For KIT see MM66009 or MM66009B

Diameter = Ø 114.2 Length = 61.3

Diameter = Ø 79.93 Length = 49.3

Diameter = 72Ø x 60.3 x 40.4 78/74548E

Diameter = 75 Ø x 47.5 Liugong ZL50CX Wheel Loader

Calliper SEAL KIT (Brake Fluid) Luigong ZL50CX Wheel Loader ** ONE KIT DOES FOUR PISTONS **
The calliper piston transfers force to the brake pad. A scored or corroded piston damages seals and causes leaks or sticking.
Pitting, corrosion or scoring on the piston surface, or seals that keep failing after a rebuild, mean the piston itself should be replaced.
ManuMark calliper pistons are precision machined and ground to size, ready to fit with a matching calliper seal kit. All 19 calliper pistons lines are manufactured by Pitchline Engineering in an ISO 9001 environment in Pinetown and supplied from our Pinetown branch across South Africa.
Whenever the sealing surface is pitted, scored or corroded, because a new seal will not hold against a damaged piston.
Yes. They are CNC turned and ground by Pitchline Engineering in Pinetown.
Use the ManuMark part number, or the diameter and calliper reference, listed on this page.