Topic ID: id_17423243
Version: 3.0
Date: Apr 22, 2019 12:56:28 AM

Collimator Assembly Replacement

Prerequisites

Table 2. Tools and test equipment
Item	Quantity	Effectivity	Part number	Manufacturer
Gantry hoist, post and boom	1	-	-	-
Calibrated Torque Wrench Set	1	-	-	-
Dial Indicator Gauges	2	-	-	-
Chain Hoist	1	-	5149069 (Non-CE); 5192679 (CE)	-

Table 4. Replacement parts
Item	Quantity	Effectivity	Part number	Manufacturer
Collimator FRU Assembly	1	-	5460487	-
Collimator FRU Assembly BJ made	1	-	5345001-2	BJ Made

Table 5. Safety

danger

Electrocution hazard
High Voltages present.
Use proper lockout/tagout procedures before replacing components. See safety menu of Service Document gui for appropriate procedures.

notice

5460487 only can be replaced by 5460487. 5345001-2 can be replaced by either 5345001-2 or 5460487.

notice

Follow ALL required safety and PPE procedures customary for your organization when working on this product.

note:

Before beginning this procedure, please read the safety information in Equipment Service - Gantry (located in the Safety tab of this publication).

Overview

The Collimator Assembly is a Certified Component and must be replaced following the procedures for replacing a certified component found under Replacement >Certified Component Replacement Retest Matrix.

Procedure

notice

Potential For Equipment Damage. DO NOT lift the Collimator by the Motors.

Move table to its home position.
Remove gantry covers as described under the section Replacement > Gantry > Enclosure
Remove the tube by following the procedure in Tube Replacement.
Disconnect connectors J8 and J9 from collimator.
Remove collimator by removing the two (2) mounting bolts from the top, two (2) bolts from the bottom, and 2 bolts from the rear of the collimator.
Install new collimator by replacing the six (6) bolts removed in above step.
1. Apply Pre-load torque to M14 Mounting bolts:
  
  Table 7. Pre-Load Torque
  36 lb-ft 53 N-m 465 lb-in 540 kg-cm
2. Apply Final torque to M14 Mounting bolts:
  
  Table 8. Final Torque
  78 lb-ft 106 N-m 937 lb-in 1081 kg-cm
Secure the tube back into place following the procedure Tube Replacement
Reassemble gantry covers.
Complete forms during finalization. See Certified Component Verification Form e-4879.

Finalization

Perform the following procedures in this order:
- FLASH Download
- Gantry Rotation Safety Check
- Gantry Balance Check
- Z-Alignment
- Cold ISO Alignment
- Hot ISO Alignment
- HHS Scans
- Collimator Calibration
- Detailed Calibration
- Fast Calibration
- System Scanning Test
- Quality Assurance Test
- System State Save Restore

Item	Quantity	Effectivity	Part number	Manufacturer
Transformer Oil - (Mineral Based Transformer Oil)	-	-	-	-
Dry Wipes or Paper Towel	-	-	-	-