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Idiomas disponibles
Idiomas disponibles
Air Regulator
Regulated air pressure is necessary for proper
performance of the air ratchet. The Snap-on AHR426
Regulator, or equivalent, will adjust and maintain the
recommended air pressure of 90 psig (6.2 bar, 620 kPa).
Pressure less than this reduces efficiency, while pressure
greater than this increases blows and speed beyond the
rated capacity—creating potential hazards and possible
damage to the air tool. Check the air pressure at the
regulator while using the tool in a normal manner.
Air Line Lubricator
✓
Do not use a heavy grade of oil because stalling
and low performance will result.
The preferred method of lubricating the air ratchet motor
is to use an air line lubricator such as the Snap-on
AHR428 Lubricator. It should be filled with Snap-on IM6
Air Motor Oil or a good grade of SAE 10W oil.
If an air line lubricator is not used, lubricate the air motor
by injecting approximately 1/8 oz. (3.7 ml) of IM6 Air
Motor Oil into the air inlet of the tool each day before
using it. IM6 Oil is specially formulated for air tools and
no flushing solvent is needed.
Flushing
If the unit seems sluggish apply 3 or 4 squirts of IM6 Air
Motor Oil into the air inlet of the ratchet each day before
using, and again at the end of each work day.
Air Strainer
An air strainer is built into the removable air inlet bushing
located at the rear of the ratchet. To clean, remove the
bushing and use an air hose to blow dirt and other
particles from the screen and bushing. Torque the air
inlet bushing to 190-210 in. lb. (21.5-23.7 N•m).
Installing Sockets
The PTR72 uses 3/8" square drive sockets. Be sure that
only power or impact sockets are used.
Ratchet Mechanism
Lubrication
Grease the ratchet mechanism daily. Using a grease gun,
Snap-on part number YA4190FAR, or similar type grease
gun, inject grease through the flush-type fitting on the
selector knob until fresh grease becomes visible on both
sides of the ratchet head. Use a grease such as air ratchet
grease, Snap-on part number ME18A15, or an equivalent
type.
✓
The
grease
gun,
YA4190FAR, includes YA4190CAP and YA4190DIS.
ZPTR72CE Rev. C
Snap-on
part
number
Trigger
A trigger controls the air flow valve, which regulates the
power and speed of the ratchet. The button provides for
variable low speed control with feathering ability and
progressive, high speed control for high torque
requirements. The distance of trigger movement directly
controls the amount of air flow to the air motor.
Reverse Mechanism
The direction of rotation is determined by the position of
the selector knob in the drive body. Be sure the selector
knob is positioned fully in either direction before
depressing the trigger. Turning the selector knob to the
left turns the nut or bolt in a clockwise direction.
Service Instructions
✓
Refer to Figure 2 for parts listing. Use only
genuine
Snap-on
maintenance and repair. Servicing and repairs
should be performed only by trained personnel.
Repair parts and service manual available
through your authorized Snap-on representative.
Torque Specifications
Inlet Bushing ....... 190-230 in. lb. (21.5-26.0 N•m)
Clamp Nut ...................... 45-50 ft. lb. (61-68 N•m)
5
replacement
parts
for
(02/20)
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