AIR AND LUBE REQUIREMENTS
Air pressure of 90 p.s.i.g. (6 bar) at the air inlet of the tool is re- quired for maximum motor efficiency. If necessary, an air regulator should be installed to maintain this pressure when tool is in opera- tion.
Filtered and oiled air will allow the tool to operate more efficiently and yield a longer life to operating parts and mechanisms. A line filter capable of filtering particles larger than 50 microns should be used with a line oiler.
Inject 33153 grease (3 to 4 strokes) thru grease fitting located at top of main housing after each 160 hours of operation, or as expe- rience indicates, for lubrication of gearing and spindle bearings. NOTE: Be sure tool is in the fully retracted position when injecting grease thru fitting. CAUTION: An excessive amount of lubricant in a tool will affect the speed and power.
RECOMMENDED HOSE SIZE: 1/2” (13 mm) nominal inside di- ameter.
RECOMMENDED LUBRICANTS: Spindle oil 29665, 1qt. (.9 liter) container for oiler and air inlet; Grease 33153, 5lb. (2.3 kg) can for gears and bearings; “0”ring lubricant 36460, 4oz. (113 g) tube for lubrication and installation of “0”rings.
MAINTENANCE
Air tools are made of precision parts and should be handled with reasonable care when servicing. Excessive pressure exerted by a holding device may cause distortion of a part. Apply pressure evenly when disassembling (or assembling) parts which have a press fit. When removing or installing bearings, apply pressure to the bearing race that will be press fit to the mating part; if this is not practiced, Brinelling of the bearing races will occur, making re- placement necessary. It is important that the correct tools and fix- tures are used when servicing this air tool.
Disassembly should be done on a clean work bench with a clean cloth spread to prevent the loss of small parts. After disassembly is completed, all parts should be thoroughly washed in a clean sol- vent, blown dry with air and inspected for wear levels, abuse and contamination.
Double sealed or shielded bearings should never be placed in solvent unless a good method of relubricating the bearing is avail- able. Open bearings may be washed but should not be allowed to spin while being blown dry. When replacement parts are neces- sary, consult drawing containing the part for identification.
Before reassembling, lubricate parts where required. Use 33153 grease, or equivalent, in bearings. Use 36460 lubricant for “0 ring assembly. When assembling “0”rings, care must be exer- cised to prevent damage to the rubber sealing surfaces. A small amount of grease will usually hold steel balls and other small parts in place while assembling.
When ordering parts, be sure to list part number, part name, model number and serial number of tool. Use only genuine ARO© re- placement parts.
DISASSEMBLY AND ASSEMBLY OF TOOLS
Disconnect air supply from tool or shut off air supply and drain line of compressed air before performing maintenance or service to tool.
Before starting to disassemble or assemble this tool (any part or completely), be sure to read “Maintenance” section.
To minimize the possibility of parts damage and for convenience, the steps for disassembly or assembly listed on the following pages are recommended.
The basic sections and instructions for removing them from the tool are as follows:
VALVE SECTION
First, disconnect tubing from ports if any is being used. Remove five screws
MOTOR AND GEARING SECTION
Loosen four screws
HOUSING AND VALVE SECTION
To remove piston rod (44928- ) and to gain access to piston (44985), loosen four screws
4