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  2. Auto Parts
  3. Brake System
  4. Hardware
  5. Drum Brake Wheel Cylinder
  6. ACDelco 18E781

ACDelco 18E781 Drum Brake Wheel Cylinder

ACDelco 18E781 Drum Brake Wheel Cylinder Image 1
ACDelco 18E781 Drum Brake Wheel Cylinder Image 2
ACDelco 18E781 Drum Brake Wheel Cylinder Image 3
ACDelco 18E781 Drum Brake Wheel Cylinder Image 4
ACDelco 18E781 Drum Brake Wheel Cylinder Image 5
ACDelco 18E781 Drum Brake Wheel Cylinder Image 6
ACDelco 18E781 Drum Brake Wheel Cylinder Image 7
ACDelco 18E781 Drum Brake Wheel Cylinder Image 8
ACDelco 18E781 Drum Brake Wheel Cylinder

ACDelco
Brand:ACDelco
Part Number: 18E781
UPC: 00707773119136
Weight: 3.04 lbs
Condition:New



Availability:
0 in Stock
 OUT OF STOCK

Product Information

Description:

CYLINDER R (B)

ACDelco Professional Drum Brake Wheel Cylinders use both aluminum and iron castings making them a high quality replacement for many vehicles on the road today. These wheel cylinders contain both Ethylene Propylene (EPDM) and Styrene Butadiene (SBR) rubber components to provide superior resistance to heat, corrosion, and leakage. Formulated with a smooth bore finish, these cylinders have a quality seal to help increase the life of rubber components. ACDelco Professional Drum Brake Wheel Cylinders are ready to bench bleed and install right out of the box - no assembly required. These premium aftermarket replacement drum brake wheel cylinders are manufactured to meet your expectations for fit, form, and function. ⚠ WARNING: Cancer and Reproductive Harm - https://www.P65Warnings.ca.gov

Features and Benefits:

  • Cast iron and aluminum specifications; no extra stress on the brake boosting mounting
  • Meets the brake performance requirements of SAE J1153 and J1154 testing, providing reliability and quality
  • Pressure tested to ensure safe and confident braking
  • Trivalent coated bleeder screws provide extra protection and added durability

Specifications:

Attachment Type:
Bolted
Bleeder Screw Cap Included:
Yes
Bleeder Screw Included:
Yes
Bore Diameter:
1.1875 in.
Bore Diameter:
30.1625 mm
Brake Line Inlet Thread Diameter:
0.393 in.
Brake Line Inlet Thread Diameter:
10 mm
Casting Material:
Cast Iron
Cylinder Bore Diameter:
1.188 in.
Height (in):
3 in
Length:
5.6 in.
Mount Hole Quantity:
4
Mounting Hardware Included:
No
Programming Required:
No
Weight (lb):
3.04 lb
Width (in):
3.8 in

Features and Benefits:

  • – Calipers and wheel cylinders should be checked every brake inspection and serviced or replaced as required.
  • – Check brake fluid level at every oil change. Replace fluid according to owner's manual recommendations.
  • – Check the thickness of your brake pads.
  • – Inspect the brake lines for rust, punctures, or visible leaks (You may be able to do this, but consult a qualified technician if necessary).
  • – Inspection of brake lining and pads for wear or contamination by brake fluid or grease.
  • – Inspection of the brake hoses for brittleness or cracking.
  • – Inspection of wheel bearings and grease seals.
  • – Parking brake adjustments (as needed).
  • The following inspections and maintenance procedures can help prevent potential brake problems:
  • The following should be conducted by a qualified technician:

Specifications:

Country of Origin:
CN

Select a vehicle to narrow ACDelco 18E781 Drum Brake Wheel Cylinder fitment info!

Last Updated: 03/03/2024

Years Vehicle Per Vehicle Position Fit NotesFitment Notes

2002

 

2002

 
Chevrolet W3500 Tiltmaster

5.7L V8 Gas OHV
1
 
Rear Right (Passenger) Rearward
 
Gold
To 3/02
 

Chevrolet W3500 Tiltmaster



5.7L V8 Gas OHV

Rear Right (Passenger) Rearward Gold
To 3/02

1 Per Vehicle

2003

 

2003

 
Chevrolet W4500 Tiltmaster

4.8L L4 Diesel Turbo
1
 
Rear Right (Passenger) Rearward
 
Gold
w/o Bleeder Screw
To 2/03
 

Chevrolet W4500 Tiltmaster



4.8L L4 Diesel Turbo

Rear Right (Passenger) Rearward Gold
w/o Bleeder Screw
To 2/03

1 Per Vehicle

2002

 

2001

 

2000

 

1999

 

2002

 

2001

 

2000

 

1999

 
Chevrolet W4500 Tiltmaster

4.8L L4 Diesel Turbo
1
 
Rear Right (Passenger) Rearward
 
Gold
w/o Bleeder Screw
 

Chevrolet W4500 Tiltmaster



4.8L L4 Diesel Turbo

Rear Right (Passenger) Rearward Gold
w/o Bleeder Screw

1 Per Vehicle

1998

 

1998

 
Chevrolet W4500 Tiltmaster

3.9L L4 Diesel
1
 
Rear Right (Passenger) Rearward
 
Gold
w/o Bleeder Screw
From 01/1998
 

Chevrolet W4500 Tiltmaster



3.9L L4 Diesel

Rear Right (Passenger) Rearward Gold
w/o Bleeder Screw
From 01/1998

1 Per Vehicle

1997

 

1997

 
Chevrolet W4500 Tiltmaster

3.9L L4 Diesel
1
 
Rear Right (Passenger) Rearward
 
Gold
w/o Bleeder Screw
w/ 14,250 lb. GVW
To 12/1997
 

Chevrolet W4500 Tiltmaster



3.9L L4 Diesel

Rear Right (Passenger) Rearward Gold
w/o Bleeder Screw
w/ 14,250 lb. GVW
To 12/1997

1 Per Vehicle

1997

 

1997

 
Chevrolet W4500 Tiltmaster

5.7L V8 Gas OHV
1
 
Rear Right (Passenger) Rearward
 
Gold
with 13,250lbs GVW
w/o Bleeder Screw
To 09/1997
 

Chevrolet W4500 Tiltmaster



5.7L V8 Gas OHV

Rear Right (Passenger) Rearward Gold
with 13,250lbs GVW
w/o Bleeder Screw
To 09/1997

1 Per Vehicle

1996

 

1995

 

1996

 

1995

 
Chevrolet W4500 Tiltmaster

3.9L L4 Diesel
1
 
Rear Right (Passenger) Rearward
 
Gold
w/o Bleeder Screw
w/ 14,250 lb. GVW
 

Chevrolet W4500 Tiltmaster



3.9L L4 Diesel

Rear Right (Passenger) Rearward Gold
w/o Bleeder Screw
w/ 14,250 lb. GVW

1 Per Vehicle

1996

 

1995

 

1996

 

1995

 
Chevrolet W4500 Tiltmaster

5.7L V8 Gas OHV
1
 
Rear Right (Passenger) Rearward
 
Gold
with 13,250lbs GVW
w/o Bleeder Screw
 

Chevrolet W4500 Tiltmaster



5.7L V8 Gas OHV

Rear Right (Passenger) Rearward Gold
with 13,250lbs GVW
w/o Bleeder Screw

1 Per Vehicle

1994

 

1994

 
Chevrolet W4500 Tiltmaster

3.9L L4 Diesel
1
 
Rear Right (Passenger) Rearward
 
Gold
w/o Bleeder Screw
w/ 14,250 lb. GVW
From 09/1994
 

Chevrolet W4500 Tiltmaster



3.9L L4 Diesel

Rear Right (Passenger) Rearward Gold
w/o Bleeder Screw
w/ 14,250 lb. GVW
From 09/1994

1 Per Vehicle

1994

 

1994

 
Chevrolet W4500 Tiltmaster

3.9L L4 Diesel,
5.7L V8 Gas OHV
1
 
Rear Right (Passenger) Rearward
 
Gold
w/o Bleeder Screw
w/ 14,250 lb. GVW
w/ 13,000 lb. GVW
To 8/94
 

Chevrolet W4500 Tiltmaster



3.9L L4 Diesel,
5.7L V8 Gas OHV

Rear Right (Passenger) Rearward Gold
w/o Bleeder Screw
w/ 14,250 lb. GVW
w/ 13,000 lb. GVW
To 8/94

1 Per Vehicle

1994

 

1994

 
Chevrolet W4500 Tiltmaster

5.7L V8 Gas OHV
1
 
Rear Right (Passenger) Rearward
 
Gold
with 13,250lbs GVW
w/o Bleeder Screw
From 09/1994
 

Chevrolet W4500 Tiltmaster



5.7L V8 Gas OHV

Rear Right (Passenger) Rearward Gold
with 13,250lbs GVW
w/o Bleeder Screw
From 09/1994

1 Per Vehicle

1993

 

1993

 
Chevrolet W4500 Tiltmaster

3.9L L4 Diesel,
5.7L V8 Gas OHV
1
 
Rear Right (Passenger) Rearward
 
Gold
w/o Bleeder Screw
w/ 13,000 lb. GVW
To 11/93
 

Chevrolet W4500 Tiltmaster



3.9L L4 Diesel,
5.7L V8 Gas OHV

Rear Right (Passenger) Rearward Gold
w/o Bleeder Screw
w/ 13,000 lb. GVW
To 11/93

1 Per Vehicle

1993

 

1993

 
Chevrolet W4500 Tiltmaster

3.9L L4 Diesel,
5.7L V8 Gas OHV
1
 
Rear Right (Passenger) Rearward
 
Gold
w/o Bleeder Screw
w/ 14,250 lb. GVW
w/ 13,000 lb. GVW
From 12/1993
 

Chevrolet W4500 Tiltmaster



3.9L L4 Diesel,
5.7L V8 Gas OHV

Rear Right (Passenger) Rearward Gold
w/o Bleeder Screw
w/ 14,250 lb. GVW
w/ 13,000 lb. GVW
From 12/1993

1 Per Vehicle

1992

 

1992

 
Chevrolet W4500 Tiltmaster

3.9L L4 Diesel
1
 
Rear Right (Passenger) Rearward
 
Gold
w/o Bleeder Screw
w/ 13,000 lb. GVW
From 8/92
 

Chevrolet W4500 Tiltmaster



3.9L L4 Diesel

Rear Right (Passenger) Rearward Gold
w/o Bleeder Screw
w/ 13,000 lb. GVW
From 8/92

1 Per Vehicle

2002

 

2002

 
GMC W3500 Forward

5.7L V8 Gas OHV
1
 
Rear Right (Passenger) Rearward
 
Gold
To 3/02
 

GMC W3500 Forward



5.7L V8 Gas OHV

Rear Right (Passenger) Rearward Gold
To 3/02

1 Per Vehicle

2003

 

2003

 
GMC W4500 Forward

4.8L L4 Diesel Turbo
1
 
Rear Right (Passenger) Rearward
 
Gold
w/o Bleeder Screw
To 2/03
 

GMC W4500 Forward



4.8L L4 Diesel Turbo

Rear Right (Passenger) Rearward Gold
w/o Bleeder Screw
To 2/03

1 Per Vehicle

2002

 

2001

 

2000

 

1999

 

2002

 

2001

 

2000

 

1999

 
GMC W4500 Forward

4.8L L4 Diesel Turbo
1
 
Rear Right (Passenger) Rearward
 
Gold
w/o Bleeder Screw
 

GMC W4500 Forward



4.8L L4 Diesel Turbo

Rear Right (Passenger) Rearward Gold
w/o Bleeder Screw

1 Per Vehicle

1998

 

1998

 
GMC W4500 Forward

3.9L L4 Diesel
1
 
Rear Right (Passenger) Rearward
 
Gold
w/o Bleeder Screw
From 01/1998
 

GMC W4500 Forward



3.9L L4 Diesel

Rear Right (Passenger) Rearward Gold
w/o Bleeder Screw
From 01/1998

1 Per Vehicle

1997

 

1997

 
GMC W4500 Forward

3.9L L4 Diesel
1
 
Rear Right (Passenger) Rearward
 
Gold
w/o Bleeder Screw
w/ 14,250 lb. GVW
To 12/1997
 

GMC W4500 Forward



3.9L L4 Diesel

Rear Right (Passenger) Rearward Gold
w/o Bleeder Screw
w/ 14,250 lb. GVW
To 12/1997

1 Per Vehicle

1996

 

1995

 

1996

 

1995

 
GMC W4500 Forward

3.9L L4 Diesel
1
 
Rear Right (Passenger) Rearward
 
Gold
w/o Bleeder Screw
w/ 14,250 lb. GVW
 

GMC W4500 Forward



3.9L L4 Diesel

Rear Right (Passenger) Rearward Gold
w/o Bleeder Screw
w/ 14,250 lb. GVW

1 Per Vehicle

1994

 

1994

 
GMC W4500 Forward

3.9L L4 Diesel
1
 
Rear Right (Passenger) Rearward
 
Gold
w/o Bleeder Screw
w/ 14,250 lb. GVW
From 09/1994
 

GMC W4500 Forward



3.9L L4 Diesel

Rear Right (Passenger) Rearward Gold
w/o Bleeder Screw
w/ 14,250 lb. GVW
From 09/1994

1 Per Vehicle

1994

 

1994

 
GMC W4500 Forward

3.9L L4 Diesel
1
 
Rear Right (Passenger) Rearward
 
Gold
w/o Bleeder Screw
w/ 14,250 lb. GVW
w/ 13,000 lb. GVW
To 8/94
 

GMC W4500 Forward



3.9L L4 Diesel

Rear Right (Passenger) Rearward Gold
w/o Bleeder Screw
w/ 14,250 lb. GVW
w/ 13,000 lb. GVW
To 8/94

1 Per Vehicle

1993

 

1993

 
GMC W4500 Forward

3.9L L4 Diesel
1
 
Rear Right (Passenger) Rearward
 
Gold
w/o Bleeder Screw
w/ 13,000 lb. GVW
To 11/93
 

GMC W4500 Forward



3.9L L4 Diesel

Rear Right (Passenger) Rearward Gold
w/o Bleeder Screw
w/ 13,000 lb. GVW
To 11/93

1 Per Vehicle

1993

 

1993

 
GMC W4500 Forward

3.9L L4 Diesel
1
 
Rear Right (Passenger) Rearward
 
Gold
w/o Bleeder Screw
w/ 14,250 lb. GVW
w/ 13,000 lb. GVW
From 12/1993
 

GMC W4500 Forward



3.9L L4 Diesel

Rear Right (Passenger) Rearward Gold
w/o Bleeder Screw
w/ 14,250 lb. GVW
w/ 13,000 lb. GVW
From 12/1993

1 Per Vehicle

1992

 

1992

 
GMC W4500 Forward

3.9L L4 Diesel
1
 
Rear Right (Passenger) Rearward
 
Gold
w/o Bleeder Screw
w/ 13,000 lb. GVW
From 8/92
 

GMC W4500 Forward



3.9L L4 Diesel

Rear Right (Passenger) Rearward Gold
w/o Bleeder Screw
w/ 13,000 lb. GVW
From 8/92

1 Per Vehicle

2002

 

2002

 
Isuzu NPR

5.7L V8 Gas OHV
1
 
Rear Right (Passenger) Rearward
 
Gold
w/o Bleeder Screw
To 3/02
 

Isuzu NPR



5.7L V8 Gas OHV

Rear Right (Passenger) Rearward Gold
w/o Bleeder Screw
To 3/02

1 Per Vehicle

2001

 

2001

 
Isuzu NPR

5.7L V8 Gas OHV
1
 
Rear Right (Passenger) Rearward
 
Gold
w/o Bleeder Screw
From 07/2001
 

Isuzu NPR



5.7L V8 Gas OHV

Rear Right (Passenger) Rearward Gold
w/o Bleeder Screw
From 07/2001

1 Per Vehicle

1997

 

1997

 
Isuzu NPR

3.9L L4 Diesel
1
 
Rear Right (Passenger) Rearward
 
Gold
w/o Bleeder Screw
w/ 14,250 lb. GVW
To 12/1997
 

Isuzu NPR



3.9L L4 Diesel

Rear Right (Passenger) Rearward Gold
w/o Bleeder Screw
w/ 14,250 lb. GVW
To 12/1997

1 Per Vehicle

1997

 

1997

 
Isuzu NPR

5.7L V8 Gas OHV
1
 
Rear Right (Passenger) Rearward
 
Gold
with 13,250lbs GVW
w/o Bleeder Screw
To 09/97
 

Isuzu NPR



5.7L V8 Gas OHV

Rear Right (Passenger) Rearward Gold
with 13,250lbs GVW
w/o Bleeder Screw
To 09/97

1 Per Vehicle

1996

 

1996

 
Isuzu NPR

5.7L V8 Gas OHV
1
 
Rear Right (Passenger) Rearward
 
Gold
with 13,250lbs GVW
w/o Bleeder Screw
 

Isuzu NPR



5.7L V8 Gas OHV

Rear Right (Passenger) Rearward Gold
with 13,250lbs GVW
w/o Bleeder Screw

1 Per Vehicle

1996

 

1995

 

1996

 

1995

 
Isuzu NPR

3.9L L4 Diesel
1
 
Rear Right (Passenger) Rearward
 
Gold
w/o Bleeder Screw
w/ 14,250 lb. GVW
 

Isuzu NPR



3.9L L4 Diesel

Rear Right (Passenger) Rearward Gold
w/o Bleeder Screw
w/ 14,250 lb. GVW

1 Per Vehicle

1995

 

1995

 
Isuzu NPR

5.7L V8 Gas
1
 
Rear Right (Passenger) Rearward
 
Gold
with 13,250lbs GVW
w/o Bleeder Screw
 

Isuzu NPR



5.7L V8 Gas

Rear Right (Passenger) Rearward Gold
with 13,250lbs GVW
w/o Bleeder Screw

1 Per Vehicle

1994

 

1994

 
Isuzu NPR

3.9L L4 Diesel
1
 
Rear Right (Passenger) Rearward
 
Gold
w/o Bleeder Screw
w/ 14,250 lb. GVW
From 09/1994
 

Isuzu NPR



3.9L L4 Diesel

Rear Right (Passenger) Rearward Gold
w/o Bleeder Screw
w/ 14,250 lb. GVW
From 09/1994

1 Per Vehicle

1994

 

1994

 
Isuzu NPR

3.9L L4 Diesel,
5.7L V8 Gas
1
 
Rear Right (Passenger) Rearward
 
Gold
w/o Bleeder Screw
w/ 14,250 lb. GVW
w/ 13,000 lb. GVW
To 8/94
 

Isuzu NPR



3.9L L4 Diesel,
5.7L V8 Gas

Rear Right (Passenger) Rearward Gold
w/o Bleeder Screw
w/ 14,250 lb. GVW
w/ 13,000 lb. GVW
To 8/94

1 Per Vehicle

1994

 

1994

 
Isuzu NPR

5.7L V8 Gas
1
 
Rear Right (Passenger) Rearward
 
Gold
with 13,250lbs GVW
w/o Bleeder Screw
From 09/1994
 

Isuzu NPR



5.7L V8 Gas

Rear Right (Passenger) Rearward Gold
with 13,250lbs GVW
w/o Bleeder Screw
From 09/1994

1 Per Vehicle

1993

 

1993

 
Isuzu NPR

3.9L L4 Diesel,
5.7L V8 Gas
1
 
Rear Right (Passenger) Rearward
 
Gold
w/o Bleeder Screw
w/ 13,000 lb. GVW
To 11/93
Front Disc Brakes
 

Isuzu NPR



3.9L L4 Diesel,
5.7L V8 Gas

Rear Right (Passenger) Rearward Gold
w/o Bleeder Screw
w/ 13,000 lb. GVW
To 11/93
Front Disc Brakes

1 Per Vehicle

1993

 

1993

 
Isuzu NPR

3.9L L4 Diesel,
5.7L V8 Gas
1
 
Rear Right (Passenger) Rearward
 
Gold
w/o Bleeder Screw
w/ 14,250 lb. GVW
w/ 13,000 lb. GVW
From 12/1993
 

Isuzu NPR



3.9L L4 Diesel,
5.7L V8 Gas

Rear Right (Passenger) Rearward Gold
w/o Bleeder Screw
w/ 14,250 lb. GVW
w/ 13,000 lb. GVW
From 12/1993

1 Per Vehicle

1992

 

1992

 
Isuzu NPR

3.9L L4 Diesel,
5.7L V8 Gas
1
 
Rear Right (Passenger) Rearward
 
Gold
w/o Bleeder Screw
w/ 13,000 lb. GVW
Front Disc Brakes
From 8/92
 

Isuzu NPR



3.9L L4 Diesel,
5.7L V8 Gas

Rear Right (Passenger) Rearward Gold
w/o Bleeder Screw
w/ 13,000 lb. GVW
Front Disc Brakes
From 8/92

1 Per Vehicle

2003

 

2003

 
Isuzu NPR-HD

4.8L L4 Diesel Turbo
1
 
Rear Right (Passenger) Rearward
 
Gold
w/o Bleeder Screw
To 2/03
 

Isuzu NPR-HD



4.8L L4 Diesel Turbo

Rear Right (Passenger) Rearward Gold
w/o Bleeder Screw
To 2/03

1 Per Vehicle

2002

 

2001

 

2000

 

1999

 

2002

 

2001

 

2000

 

1999

 
Isuzu NPR-HD

4.8L L4 Diesel Turbo
1
 
Rear Right (Passenger) Rearward
 
Gold
w/o Bleeder Screw
 

Isuzu NPR-HD



4.8L L4 Diesel Turbo

Rear Right (Passenger) Rearward Gold
w/o Bleeder Screw

1 Per Vehicle