7
en
head screws (9) and tighten all screws with 6 mm Allen
wrench.
11.5 Trigger valve plunger (37) and trigger valve
bushing assembly (35)
Install 0-rings (36) and (38). Set the trigger valve plunger
(37) into the trigger valve bushing (35) and insert them
into the grip assembly (40). Insert 5 0-rings (55) in trig-
ger valve body assembly (56), mount this in housing
(15) and push upwards towards trigger valve plunger
(37). Insert 2 each hex socket screws (58) with wash-
ers (57) and secure with 3mm Allen Wrench. (torque
wrench (to 4,4 ft-lbf / 6Nm.
11.6 Nosepiece (8)
Insert nosepiece (8) over driver blade assembly (16)
and mount on the flange assembly (10). Slightly tight-
en 3 hex socket screws (5) with spacing sleeve (7) by
hand. Then tighten down with torque wrench (to 8,8 ft-
lbf / 12Nm).
11.7 Safety valve piston assembly (54)
(Safety yoke disassembled, see 10.3) Mount 3 0-rings
(55). Place spring (67) in housing bore. Slide safety valve
piston assembly (54) into housing (15).
11.8 Safety yoke (1)
(Valve piston and nosepiece already assembled, see 11.6
and 11.7) Mount spring (4) with safety yoke (1) onto
nosepiece (8) and insert safety yoke arm in safety valve
piston (54). Mount guide plate (2) and secure hex lock-
nuts (3) with 10 mm fork wrench.
NOTE:
Check for free movement of the safety yoke. It will
be necessary to remove one hex head screw (5) in order
to install safety yoke arm into safety valve piston (54).
11.9 Pusher (47) and grip (63)
Slide pusher (47) into magazine assembly (48) from the
front. Pull back scroll spring (51) slightly. Slide grip (63)
into pusher (47) and press down over scroll spring (51),
aligning grip pin (65) with detents in magazine. Align
holes in grip and pusher. Secure both pieces with spring
pin (62) using a 2 mm pin punch. Make sure pin (62) is
flush with top and bottom of pusher.
11.10 Magazine assembly (48)
(Safety valve piston, safety yoke, pusher and grip assem-
bled, see 11.7, 11.8 and 11.9) Insert magazine assem-
bly (48) as far as it will go in nosepiece (8). Secure 2
hex socket screws (29), washers (61) and locknuts (66)
with 17 mm fork wrench and 5 mm Allen wrench. Tight-
en (to 14,8 ft-Ibf / 2ONm) with torque wrench.
11.11 Check tool for proper operation
11.12 Connect the tool to a 175 PSI (12 BAR) air
supply.
Insert a nail strip. The tool must not fire by depressing
the trigger alone or by depressing the safety yoke alone.
Never point the tool at a person.
12. R4X12 S Spare Parts
Ref # Hilti #
Description
Ref # Hilti #
Description
1
14907
Safety yoke X12
44
12056
Plug coupling
3
/
8
”
2
11912
Guide plate
45
12534
Grip cover
3
51117
Prevail torque hex nut M6
46
14948
Plate
4
12547
Compression spring 1,4X10,6X38
47
14909
Pusher X12
5
72477
Hex skt hd cap screw M6X30
48
14906
Nail magazine X12 assy
7
11913
Spacing sleeve
49
12539
Blind rivet
8
380653
Nose X12 assy
50
14934
Spring clip
9
12585
Hex skt hd cap screw M8X30
51
12452
Scroll spring 14X0,3X600
10
380478
Flange X12 assy
52
380647
Valve bushing lwr. assy
11
12503
O-ring 78,97X3,53
53
12495
O-ring 9,25X1,78
12
12440
Buffer
54
380648
Valve piston assy
13
380645
Cylinder assy
55
12088
O-ring 4,47X1,78
14
12497
O-ring 63,17X2,62
56
380649
Valve body assy
15
380466
Housing assy
57
8610
Retaining washer SCHNORR 5
16
380644
Driver blade X12 assy
58
9648
Hex skt hd cap screw M5X25
17
12501
O-ring 53,57X3,53
59
380646
Valve bushing upr. assy
18
12499
O-ring 80X3
60
380499
Dowel pin 3M6X18
19
12498
O-ring 64,77X2,62
61
66299
Washer 10,5
Printed: 07.07.2013 | Doc-Nr: PUB / 5070503 / 000 / 00
