Gasket (b) 877325

Description:

This is a genuine Hitachi replacement part, it is sold individually.
The purpose of the 877325 Gasket is to create a seal between the Exhaust Cover and the Main Body of the nail gun models shown below.
Because of the pressure this Gasket is subject to it will wear and will need to be replaced
Indications are an air leak, sluggish or not sinking the nail, or the driver not retracting.

Frequently Purchased With

Gasket (a)
$3.99

O-ring
$4.99

Piston Bumper ..
$20.72

Head Cap And G..
$51.25

Piston Driver ..
$39.04

Gasket (f)
$4.99

Gasket (g)
$4.99

Gasket C
$4.99

Compatibility

This part is compatible with the following machines:

Metabo HPT (Hitachi)

NR83AA3 Clipped Head Framing Nailer
NV65AC Coil Pallet Nailer
NV83A2 Full Round Head Coil Nailer
NV85AG Coil Siding/Framing Nailer
NR83A2(S) Framing Nailer, Full Head, Plastic Strip Collation (without Depth Adjustment)
83AA2 Strip Nailer
NR83A 3-1/4" Full Head Nailer
NR83AA 3-1/4" Clipped head Framing Nailer
NR83AA2 3-1/4" Clipped head Framing Nailer
NV65AA Nailer
NV75A Nailer
NV83A 3-1/4" Full Head, Framing Coil Nailer
NV83A3 Nailer
NV83A4 Nailer

NV83A7 Nailer
NR83A3S Strip Nailer
NR83A3 Strip Nailer
NR83AA4 3-1/4" Paper Collated Framing Nailer
NR83A2 Strip Nailer
NR83A5 Strip Nailer
NR83A5(S)M 3-1/4 Inch Rnd Head Framing Nailer W/Out Depth Adjustment
NR83A5M 3-1/4 Inch Rnd Head Framing Nailer W/ Depth Adjustment
NR83AA5M 3-1/4 Inch Clipped Head Fram Nailer Accepts Paper Tape Collated Nails
NV83A5M 3-1/4 Inch Coil Framing Nailer 2 Inch-3-1/4 Inch X 0.099 Inch-0.131 Inch
NR83A2(Y) Nailer
NR83A5(S) Nailer
NR83AA5 Nailer

Expand the 27 compatible machines

Products Compatibility

This item works with the following types of products:

• Nailer

Repair Instructions: Submitted by Customers Like You

2 of 2 people found this instruction helpful

Tool Type:

Nailer

Parts Used:

Gasket (f) - 877329

Exhaust Valve (orange) - 884110

O-ring - 877368

Gasket (g) - 877327

Head Cap And Gasket Set - 887769

Gasket (b) - 877325

Gasket C - 877854

Repair Difficulty:

Easy

Time Spent Repairing:

15-30 minutes

Tools Used:

Pliers, Wrench Set, Scraper blade

Nailgun leaked air.

Took apart and replaced the parts. Reassembled.

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1 of 1 people found this instruction helpful

Tool Type:

Nailer

Parts Used:

O-ring - 877368

Cylinder O-ring - 890443

Cylinder O-ring (i.d 79.3) - 877313

Cylinder O-ring (i.d 69.3) - 877314

Cylinder Ring - 886483

Gasket (g) - 877327

Cylinder O-ring (i.d 63.9) - 890444

Piston Bumper (b) - 883511

Gasket (a) - 877334

Gasket (c) - 877326

Gasket (b) - 877325

Repair Difficulty:

Medium

Time Spent Repairing:

30-60 minutes

Tools Used:

Screwdriver, Pliers, Wrench Set, Allen wrench

Leak too much air,

Removed the four screws from the top cover
Looked to see what parts I would need to fix the leak.
I ordered about every o-ring and seal in the gun
Replaced all that I ordered
The gun is like new again

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1 of 1 people found this instruction helpful

Tool Type:

Nailer

Parts Used:

Gasket (f) - 877329

Head Cap And Gasket Set - 877307

Gasket (b) - 877325

Repair Difficulty:

Easy

Time Spent Repairing:

Less than 15 minutes

Tools Used:

Nutdriver

Nailer was leaking air and would not operate correctly.

Disassembled the top side of the nailer and inspected components for damage. Found head cap was damaged. Researched the replacement parts, ordered and installed the new head cap and the gaskets. Tested the nailer, held the air pressure and operated just fine. Schematic explosion helped in ordering correct replacement parts. Thanks. Saved a $500 nailer.

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Tool Type:

Nailer

Parts Used:

Head Cap And Gasket Set - 877307

Gasket (b) - 877325

Repair Difficulty:

Easy

Time Spent Repairing:

15-30 minutes

Tools Used:

Screwdriver, Allen wrench set

Leaking gaskets, interior plunger ,driver damage

Simply removed the head, removed the broken parts and replaced them with new parts. A much simpler repair than I expected. The nail guns work perfectly now.
No special skills required.

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Tool Type:

Nailer

Parts Used:

Gasket (b) - 877325

Repair Difficulty:

Easy

Time Spent Repairing:

Less than 15 minutes

Tools Used:

, Allen wrench

Leaked air

Took top off and replaced gasket.

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Tool Type:

Nailer

Parts Used:

Feeder Shaft - 877825

Shaft Ring - 877826

Feeder Spring - 877851

Gasket (b) - 877325

Repair Difficulty:

Medium

Time Spent Repairing:

15-30 minutes

Tools Used:

Pliers, Adjustable Wrench, Allen pack

nails not feeding

removed old feeder shaft and feeder spring
Installed new spring, shaft and shaft ring

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Tool Type:

Nailer

Parts Used:

Repair Difficulty:

Easy

Time Spent Repairing:

15-30 minutes

Tools Used:

, Long hex wrench

Megazine was broke as well as the top cover and my gasket were blown

Removing the megazine completely

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Tool Type:

Nailer

Parts Used:

Repair Difficulty:

Easy

Time Spent Repairing:

15-30 minutes

Tools Used:

, Allen wrench

Internal plastic parts & O rings plus gaskets disintegrated

Removed all screws
Removed head
Removed piston
Changed out o rings
Cleaned up gasket surfaces,.
Installed new parts
Added oil and tested gun.

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Tool Type:

Nailer

Parts Used:

Repair Difficulty:

Medium

Time Spent Repairing:

30-60 minutes

Tools Used:

Pliers, Power Drill, Socket set, Wrench Set, Nutdriver

Nail gun was not sinking nails and air started to leak from gaskets. The piston bumper had broken to pieces and the gaskets had worn out.

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Tool Type:

Nailer

Parts Used:

Head Cap And Gasket Set - 877852

Hex. Socket Hd. Bolt W/sp. Was - 883507

Gasket (b) - 877325

Repair Difficulty:

Easy

Time Spent Repairing:

Less than 15 minutes

Tools Used:

Screwdriver, Pliers, Allen head wrench

My framing nailer was blowing air out of the exhaust continuously.

I removed the head cap and exhaust port finding the carbon seal inside the cap disintegrated. Cleaned the inside of the casing and replaced the head cap and gasket. Stopped leaking air and fires like new.

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Questions & Answers for Gasket (b)