R10024

PS274-A2, PS274E-A2

Safety
The guard must not retract on its own, it should only retract when the handle lever is actuated.

Instructions
4 and 6 mm wrenches are supplied with the machine.

The blade Allen bolt is left hand thread and is removed using a 6 mm wrench.

The bar support is provided as an sub assembly and comes with the spring already tensioned so that the assembly can be fitted to the segment. The spring is tensioned using a special bolt fitted in the factory, and this must only be removed when the support has been fitted onto the segment.

The armature pulley is fixed with a left hand thread Allen bolt, and is removed or fitted using a 5 mm wrench. When fitting it should be tightened to a torque of 8 Nm.

On electronic models the brake assembly is difficult to remove and re-fit and you should refer to the repair stripdown procedure for further details.

Initial production of the A2 used the steel adapter with the brake, the same as type A1 versions. From date code 44-94 a new nylon adapter with a new brake was introduced. The old and new brakes and adapters are not individually interchangeable, if you replace the old brake, upgrade to the new level using the sub assy shown. The new adapter is also shown on the drwg and parts list.

Refer to the wiring diagram when re-connecting any of the electrical components.

On electronic models the brake adapter is removed with a 19 mm spanner or socket.

The setting up and adjustment of the machine is fully detailed in the instruction manual.

Tooling
2 x castellated socket for locknut removal (41) (M12)-559570-99, (142) (M16)-559506-99.

Pin wrench for guard flange removal (157) 279663-99.
Spring compression bolt for bar support assembly (140) 559572-99.

Torque's.
Armature pulley Allen bolt (71) tightened to 8 Nm.

Grease.
General purpose light duty grease applied to o ring (188), back fence screws (89), rotary table pivot bolt and clamp area (114/115/116), segment bolt (156).

The lever pin (which was item 33) has been replaced by a steel pin (198) and nylon bush (199). In addition the lever (29) has been hardened to prevent wear (mainly caused by the old pin, item 33).  When repairing machines with a date code of less than week 20 1997 you should upgrade the machine using the kit item 29, which consists of the lever (29),  pin (198),  bush (199).  Machines with a date code greater than 2097 can be repaired using the individual pin and bush, however the lever will only be provided as a kit.    The circlip (34) is no longer required on products that are either upgraded or on products built to this new quality improved level, however it is still available on machines that only need the circlip replacing.
The table (item 1) was modified from week 36-97.   The new table does not have machined holes for the feet (item 103).  New feet have been introduced using self tapping screws.   The table is now available as a sub assembly (item 1) including the feet, and all of the screws used in the table,  to upgrade all repairs to this latest level.  The feet also come as a sub assembly including the screws (item 103) with the feet screws also available separately if required (item 101).

The new plastic insert (item 66) has now been introduced into production (week 36-98), and is fitted as standard to the machine during assembly (previously it was supplied loose in the carton).  The new insert also fits all types of the PS and DW701, DW700, DW707/E mitre saws.  The insert is available as a kit for Service, and includes the insert, fixing screws, and washers.  This new insert replaces all previous types of insert used, and is interchangeable with the old insert.

Loctite.
Loctite 601 - knob (141).
Loctite 243 - screws (82).
Loctite 243 - flange (157).

PS274-A2, PS274E-A2

Technical specifications.
A capacitor of 0.33 µF 250 V is used to prevent TV and radio interference.

PS274E armature resistance	115 V = 0.345 ohm
					230 V = 1.45 ohm
Field resistance			115 V = 0.60 ohm
					230 V = 2.23

PS274 armature resistance	115 V = 0.45 ohm
					230 V = 1.66 ohm
Field resistance			115 V = 0.60 ohm
					230 V = 2.95 ohm

Items 113, 117, 118, 153 and 171 have been modified. From 13-March 2001, they have been replaced by a channel and plastic insert. To upgrade all 5 parts must to be replaced.