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CLEANING & LUBRICATION
Make sure that you have read and understood all
safety warnings and cleaning procedures before
attempting to operate or clean this tool. Failure to do
so may result in serious injury.
WARNING: Make sure that the 4 hex socket head
bolts are securely attached to the cylinder head
before operating the tool. Loose or missing bolts
may cause leakage of burning gases causing injury
to the user and damage to the tool and property.
1. Before cleaning, check that the tool has cooled
down completely, and then remove all nails, the fuel
cell and the battery from the tool (Fig. 35).
2. Using a 4mm hex key, remove and retain the hex
socket head bolt (Fig. 36) (M5 x 14).
3. Tilt back the top cover (Fig. 37).
4. Remove the filter assembly on the cylinder head
(Fig. 38).
5. Unplug the spark plug connection from the spark
plug (Fig. 39) and carefully disconnect the motor
lead (Fig. 40).
6. Using a 4mm hex key, remove and retain the 4 hex
socket head bolts in the cylinder head (Fig. 41) (M54
x 20, 4pcs).
7. Gently lift the cylinder head away from the
combustion chamber (Fig. 42).
8. Ensuring you do not damage the fan blades,
carefully remove the o-ring from the fan (Fig. 43 &
44).
9. Using a dry cloth, clean and remove all deposits
from the o-ring. Inspect the O-ring for damage and
if necessary, replace it (part no. 192114) (Fig. 45).
10. Clean the cylinder head using brake cleaner,
paying particular attention to the spark plug. (Fig. 46)
11. A small brush may be useful to help release
some debris. You may need to repeat this 2 or 3
times until clean (Fig. 47).
12. Replace the o-ring on the cylinder head (Fig. 48).
13. Lubricate the o-ring using Bostitch gas nailer
lubricant (part no. SB-20CL) (Fig. 49).
14. Spray brake cleaner into the cylinder to loosen
any residue (Fig. 50).
15. Using a blunt instrument (e.g. a screwdriver
handle), push down the piston (Fig. 51).
16. Holding the tool upside down, spray brake
cleaner into the combustion chamber and the
chamber head, ensuring any residue falls back out
of the tool. You may need to do this 2 or 3 times using
a small rush to loosen some of the more stubborn
residue (Fig. 52).
17. Using a screwdriver or similar implement, push
the driver blade back into the tool (Fig. 53).
18. Pull back the nail feeder to disengage the tool
lockout and press down the contact arm on a hard
surface. Using the Bostitch lubricant (part no. SB-
20CL), oil around the outside groove in the
combustion chamber, where the o-ring is located
(Fig. 54).
19. Ensuring the O-ring is evenly seated on the
cylinder head, carefully locate the cylinder head
back on top of the tool, taking care not to damage
the fan blade (Fig. 55).
20. Depressing the body, assemble the cylinder head
and confirm the o-ring is not trapped. Set the 4
socket head bolts (Fig. 56).
21. Put the 4 socket head bolts back to their original
positions using a 4mm hex key(put one of the 4
socket head bolts through the wiring plate). Tighten
the head bolts while securing the wire to the wiring
plate (Fig. 57 & 58).
22. Check the o-ring is correctly seated by pulling
back the nail feeder and depressing the contact arm
(Fig. 59).
23. Reconnect the motor lead wire and then the
spark plug lead wire (Fig. 60 & 61).
24. Set the motor lead wire and the spark plug lead
wire (Fig. 62).
© Stanley Bostitch
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