Siemens L-850D/E F-Range Style 2 Inset Lights manual How to replace a prism

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L-850D/E F-Range Style 2 Inset Lights

Servicing in Maintenance Base

How to replace a prism

Procedure	To replace a prism, proceed as follows (for the tools to use, refer to page 43
	“Screws Overview”):

Step	Action

1Remove the prism clamp plate (B6) secured in the cover.

2Remove the prism keeper plate (B5) and the flat gasket (B4).

3Push the prism (B3) with the sleeve gasket (B2) towards the inside of the cover.

4Clean and degrease the prism chamber with any effective solvent.

Never use any abrasive substance.

5Apply a thin layer of lubricant MOLYKOTE BG87 INERTA (Siemens Airfield Solutions PN 7850.05.050) in the prism chamber using a small brush.

6Bring a new sleeve gasket (B3) over the new prism.

7Push the prism/gasket assembly home in the prism chamber from the inside and clean the inner surface of the prism.

8Mount a new flat gasket (B4) under the prism-keeper plate (B5).

9Apply on both B8 screws a drop of “loctite” as indicated page 43, introduce them and turn

them by a few turns only.

10Fit the prism clamp plate (B6) in the appropriate recess in the cover.

11Secure it to the cover by means of the cross recessed pan head screws (B7).

12Torque down the 4 B7 and B8 screws.

Refer to the table “Screws Overview” on page 43 for the tool to use, the torque to apply, and the eventual use of “Loctite” sealing compound.

Illustration

The illustration below clarifies the procedure:

 2002 Siemens Airfield Solutions, Incorporated	96A0266D	23
All rights reserved	Issued 2/02

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Contents Siemens Airfield Solutions 850D/E F-Range Style Inset Lights Revision Description Editor Checked Date Record of ChangesSafety precautions Safety InstructionsWarranty Parts Identification Comments and Proposals Information About this ManualTable of Contents General Information and Requirements Overview General information Equipment data Equipment required for installation and maintenance Label Toe-in InstallationInstallation Overview Organisation Applicable documents General recommendationsTool case Equipment required for installationAttack driver Additional tools and equipmentInstallation on FAA Deep Bases Overview UNC Step Action Installation methodMounting and connection How to mount the light assemblyMaintenance Overview Field maintenance Workshop maintenance and preventive maintenancePreventive maintenance Preventive Maintenance Tasks Interval Check ActionLifting tools ProcedurePreliminary Servicing in the Maintenance Base OverviewHow to open the light assembly Film disc cut-out Procedure How to replace a lampIllustration Illustration below clarifies the procedure How to replace a prism How to replace the optical assembly How to replace the cable set assembly Illustration How to close and test the light fixture Problem Possible cause Solution TroubleshootingContents This chapter contains the following topics Topic Introduction Light Assembly Part NumbersAssemblies and Exploded View Overview SeeRemarks Assemblies850E Ordering codeRemark Film disc cutout optional Ordering Code 850DList of tables Fixtures Solutions code 850E850D Cate000 010 020 030 040 050 060 070 080 090 100 Description 1411.40.xxx000 010 020 030 040 050 060 070 Description 1411.41.xxxIllustrations Description 200 210 220 230 240 250 260Part number 270 280 290 300 310 320 330 270 280 290 300 310 320 330 Toe-in Installation 100 110 120 130 140 150 160 170 180 Solutions partIllustration below shows the 12 F-Range inner covers Screw Tool Loctite Torque Screws Overview12 L-850D/E Exploded viewRange