See the below web page to view or download the Service Manual for the 6270A Pressure Calibrator. It also includes information on the Contamination Prevention System (CPS-20M) and the Pressure Measurement Module Calibration Kit (PMM-CAL-KIT-20M). At the back of the manual are drawings with part number call-outs.
See the pdf attachment at the end of this article for a useful schematic from the Service Manual (with more notes added to it).
*** Known changes to above Service Manual document:
- PMM O-ring 1785510 has been changed to 4621608 (same o-ring as PCM)
- Front Panel Bezel with Decal 4815334 is not available, but consists of these two parts that are available:
Part Number: 4488588
Description:6270A-8001,DECAL, CHASSIS, FRONT PANEL, MODEL 6270A
Part Number: 4380004
Description :6270-2013,FRONT PANEL BEZEL
A separate article is here for additional information on maintenance of the CPS,
6270A & 2271A - CPS-20M Maintenance
6270A Operation Manual (updated April 2018) and Programmer's Manual are available on this page,
Here is information on a User Seal Kit for 6270A
Part Number: 4584797
Description: 6270-SK-USER,6270 SEALS, USERS KIT
It includes 10 black o-rings for PCM and PMM, and 12 white/clear o-rings for PCM and PMM. These are also available separately.
Part Number, Description
1785485, 759270-501,O RING -008 70 DUROM 0.176 ID .070 W BUNA Y
4621608, O-RING,AS568A-006,.114 IN. ID,.254 IN. OD,.070 IN. W,POLYURETHANE,A90 DURO
Sample page from Service Manual
Port Manifold: New guide bushings and o-rings might be required when replacing a port manifold. These parts are common to the NPT, BSP and 7/16-20 manifolds.
Bushings, quantity 2 each, Part Number: 4404143
O-rings, quantity 5 each, Part Number: 1785485
NPT Port Manifold, Part Number: 4379983
BSP Port Manifold, Part Number: 4379990
7/16-20 Port Manifold, Part Number: 4454164