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WARNING
Always wear eye protection when operating or performing maintenance on this tool.
Always turn o the air supply and disconnect the air supply hose before installing, removing or adjusting any accessory on this tool or
before performing any maintenance on this tool.
Note: When reading the instructions, refer to exploded diagrams in parts Information Manuals when applicable (see under Related
Documentation for form numbers).
Lubrication
Each time a 172 or 182 Series Scaler is disassembled for maintenance
and repair or replacement of parts, pour about 3 cc of
Ingersoll Rand No. 10 Oil in the air inlet and operate the tool for 5
seconds to coat the internal parts with oil.
Disassembly
General Instructions
Do not disassemble the tool any further than necessary to replace
or repair damaged parts.
Whenever grasping a tool or part in a vise, always use leather-
covered or copper-covered vise jaws to protect the surface of
the part and help prevent distortion. This is particularly true of
threaded members and housings.
Do not remove any part which is a press t in or on a subassembly
unless the removal of that part is necessary for repairs or
replacement.
Do not disassemble the Tool unless you have a complete set of
new gaskets and O-rings for replacement.
Removal of Grip Handle or Head Block, Valve and Piston
Insert a Chisel in the tool. Clamp the shank of the Chisel in a vise
with the tool in a vertical position.
For Pistol Grip Handle (25), unscrew the Adapter Bolt Nut (38)
and pull the Pistol Grip Handle from the Adapter (35).
For all tools, loosen the Casing Locknut (45).
Grasp the ats on the Head Block (1) or (15) or Grip Handle
Adapter (35) with a large wrench and unscrew that member from
the Casing (52).
Withdraw the Valve Cap (46), Valve Spacer (49), Valve (48) and
Piston (51).
Disassembly of Throttle Mechanism
For Pistol Grip Throttle
Secure the Grip Handle in a vise with leather-covered or copper-
covered jaws, drive out Throttle Lever Pin (27) and remove
Throttle Lever (26).
Unscrew Throttle Valve Cap (32) and remove Throttle Valve
Spring (33), Throttle Valve (29) and Throttle Valve Plunger (28).
Remove Throttle Valve Face (30) from Throttle Valve.
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For Lever Throttle
Secure the Head Block (1) in a vise with leather-covered or
copper-covered jaws, drive out the Throttle Lever Pin (11) and
remove Throttle Lever (10).
Unscrew the Throttle Valve Cap (2), remove the Throttle Valve
Spring (3) and Throttle Valve (5).
Remove the Throttle Valve Face (6) from the Throttle Valve.
For Push Throttle
Secure the Push Throttle Body (18) in a vise with leather-covered
or copper-covered jaws and remove the Inlet Bushing (17).
Remove the the Throttle Body Retainer (21) and pull the Push
Throttle Body with throttle components from the Head Block.
Pull the Push Throttle Valve (19) from the Push Throttle Body.
Remove the Throttle Valve Pin (22) and the Throttle Valve Face (20)
if they need to be replaced.
Disassembly of the Retaining Mechanism
Remove the accessory from the nozzle of the tool.
Remove the Retainer Sleeve Lock Ring (57).
While holding the Scaler with the nozzle facing away from you,
rotate the Retainer Sleeve (54) to the left until the Lock
Plunger (55) snaps outward.
Fully depress the Lock Plunger and rotate the Retainer Sleeve
further to the left as far as it will go and then withdraw the
Retainer Sleeve from the end of the Casing (52).
NOTICE
When you withdraw the Retainer Sleeve, the Retainer Ball (53),
Retainer Sleeve Lock Plunger (55) and Plunger Lock Spring (56)
are free to fall from their respective recesses in the Casing. Do
not lose these parts.
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Assembly
General Instructions
Whenever grasping a tool or part in a vise, always use leather-
covered or copper-covered vise jaws. Take extra care with
threaded parts and housings.
Always clean every part and wipe every part with a thin lm of oil
before installation.
Apply a lm of O-ring lubricant to all O-rings before nal
assembly.
Assembly of the Retaining Mechanism
Look at the bore of the Retainer Sleeve and note that there is a
wide relief groove machined at right angles to the slot.
While holding the Scaler with the nozzle pointing away from you,
insert the Retainer Ball into the large recess in the Casing. Insert
the Plunger Lock Spring followed by the Lock Plunger into its
recess in the Casing.
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Hold the Retainer Sleeve so that the internal relief groove is to the
right of the slot and, with the nozzle of the tool still pointing away
from you, slide the Sleeve onto the end of the Casing so that the
Lock Plunger engages the relief groove. When the Sleeve is on the
Casing as far as it will go, rotate the Sleeve to the right until the
Lock Plunger snaps outward into the slot.
Assembly of the Throttle Mechanism
For Pistol Grip Throttle
Install the Throttle Lever (26) and secure with Throttle Lever
Pin (27).
Coat the Throttle Valve Face (30) with O-ring lubricant and install
it on the Throttle Valve (29).
Install Throttle Valve Plunger (28) and Throttle Valve (29) in
Handle.
Insert Throttle Valve Spring (33) and secure throttle components
with Throttle Valve Cap (32).
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