863S4 Bostitch Nailer - Overview

Sections of the 863S4

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Main Assembly Diagram and Parts List for Bostitch Nailer
Main Assembly
Optional Diagram and Parts List for Bostitch Nailer
Optional
Keep searches simple, eg. "belt" or "pump".
Label, Trip Adj. – Part Number: 851934
Label, Trip Adj.
PartSelect #: PS10247438
Manufacturer #: 851934
  No Longer Available
Kit-Rebuild 850/863 – Part Number: RBK18
Kit-Rebuild 850/863
PartSelect #: PS10250592
Manufacturer #: RBK18
  No Longer Available
Rocker,Trigger – Part Number: T55092
Rocker,Trigger
PartSelect #: PS10250955
Manufacturer #: T55092
  No Longer Available
Kit,Trigger Valve-Speed – Part Number: STV2
Kit,Trigger Valve-Speed
PartSelect #: PS10250785
Manufacturer #: STV2
  No Longer Available
DISC-LATCH STOP – Part Number: 103795
DISC-LATCH STOP
PartSelect #: PS12412062
Manufacturer #: 103795
  No Longer Available
SCREW-SHCS-M5X0.80X2 – Part Number: MSC5080-25
SCREW-SHCS-M5X0.80X2
PartSelect #: PS12528976
Manufacturer #: MSC5080-25
$5.95
  Special Order
Assembly,Trigger – Part Number: 100607
Assembly,Trigger
PartSelect #: PS10245509
Manufacturer #: 100607
  No Longer Available
Cap,Magazine End – Part Number: 103786
Cap,Magazine End
PartSelect #: PS10245681
Manufacturer #: 103786
  No Longer Available
Seal,Cap – Part Number: 103802
Seal,Cap
PartSelect #: PS10245688
Manufacturer #: 103802
  No Longer Available
Seal,Cylinder – Part Number: 103814
Seal,Cylinder
PartSelect #: PS10245695
Manufacturer #: 103814
  No Longer Available
Spring,Head Valve – Part Number: 103767
Spring,Head Valve
PartSelect #: PS10245675
Manufacturer #: 103767
This genuine OEM sourced hardware is specially made for use with Bostitch pneumatic staplers. It is an identical replacement for a missing or a faulty spring that was installed on a new unit. The purp...
  No Longer Available
Spring,Torsion – Part Number: 103839
Spring,Torsion
PartSelect #: PS10245705
Manufacturer #: 103839
  No Longer Available
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Questions And Answers for 863S4

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Keep searches simple. Use keywords, e.g. "leaking", "pump", "broken" or "fit".
would not fire nails
remove 2 Philips head screws, drive out drift pins with drill bit. Remove TVA6 replace with new TVA6 making sure TVA6 is completely seated and slots are aligned with drift pin holes! Drive in drift pins. Replace trigger and screws.
This did not solve the problem as suggested by Parts select.
Replaced Head Valve Seal...Problem resolved
Parts Used:
KIT-TRIGGER VALVE
  • Richard from Bogalusa, LA
  • Difficulty Level:
    A Bit Difficult
  • Total Repair Time:
    30 - 60 mins
  • Tools:
    Pliers, Screw drivers
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