AP Diving APV300 User manual

AP Diving Ltd. APV300 Inflator Maintenance Manual
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APV300 Inflator
Maintenance Manual
Version 0.3
December 2015
Written by Tino de Rijk

AP Diving Ltd. APV300 Inflator Maintenance Manual
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Table of Contents
1. Introduction........................................................................................... 4!
1.1 Functional description.....................................................................................4!
1.2 Servicing.........................................................................................................4!
1.3 Warranty .........................................................................................................4!
1.4 Copyright and Applicable Law ........................................................................4!
2. APV300 inflator Exploded Diagram and Parts List............................... 5!
2.1 APV300 inflator Main Assembly .....................................................................5!
2.2 AP50 Inflator Hose Assembly.........................................................................6!
3. Service Kit Contents and Tools ............................................................ 7!
3.1 Service Kit Contents ....................................................................................... 7!
3.2 Special Tools needed .....................................................................................8!
3.3 Standard Tools needed ..................................................................................8!
4. Disassembly Instructions...................................................................... 9!
4.1 Remove stainless steel pin (if fitted) that holds the pull cord to the dumping
elbow ....................................................................................................................9!
4.2 Unscrew stem retainer from main body..........................................................9!
4.3 Remove inlet stem from main body .............................................................. 10!
4.4 Remove O-ring from inlet stem.....................................................................10!
4.5 Unscrew cap retainer from main body..........................................................10!
4.6 Remove blue button cap...............................................................................11!
4.7 Remove direct feed button from direct feed body.........................................11!
4.8 Remove direct feed body from main moulded body .....................................11!
4.9 Remove O-ring and mesh filter from direct feed body..................................12!
4.10 Unscrew core valve from direct feed body .................................................12!
4.11 Remove back end washer from stem ......................................................... 13!
4.12 Remove back end rubber from stem ..........................................................13!
4.13 Pull stem assembly out of moulded body ................................................... 14!
4.14 Remove spring from stem assembly ..........................................................14!
4.15 Unscrew stem with back end rubber from button .......................................14!
AP50 Medium Pressure (MP) hose disassembly ...............................................15!
4.16 Remove circlip from snap connector body .................................................15!
4.17 Remove sliding collar from snap connector body.......................................15!
4.18 Remove spring from snap connector body.................................................16!
4.19 Remove 4 ball bearings from snap connector body ...................................16!
4.20 Unscrew Schraeder valve from snap connector body ................................16!
4.21 Remove O-ring from snap connector body.................................................17!
5. Clean and Replace Service Parts ...................................................... 18!
5.1 Service kit contents ......................................................................................18!
5.2 Ultrasonically clean deposits from all metal parts.........................................19!
5.3 Replace all O-rings with new ones from the Service Kit...............................19!
6. Assembly Instructions ........................................................................ 20!
6.1 Screw new stem with new back end rubber into button ...............................20!
6.2 Fit spring to stem assembly.......................................................................... 20!
6.3 Push stem assembly into moulded body ...................................................... 21!
6.4 Push new back end rubber and back end washer onto stem.......................21!
6.5 Screw new core valve into direct feed body .................................................22!
6.6 Put new O-ring and mesh filter into direct feed body....................................22!

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6.7 Put direct feed body into main moulded body ..............................................22!
6.8 Put direct feed button into direct feed body ..................................................23!
6.9 Fit new blue button cap ................................................................................23!
6.10 Screw new cap retainer onto main body ....................................................24!
6.11 Put new O-ring onto inlet stem ...................................................................24!
6.12 Push inlet stem into main body...................................................................24!
6.13 Screw new stem retainer onto main body ..................................................25!
6.14 Refit stainless steel pin (if fitted) that holds the pull cord to the dumping
elbow ..................................................................................................................25!
AP50 hose assembly.......................................................................................... 26!
4.15 Fit new O-ring onto snap connector body...................................................26!
4.16 Screw new Schraeder valve into snap connector body..............................26!
4.17 Push 4 ball bearings back into snap connector body .................................26!
4.18 Put spring onto snap connector body .........................................................27!
4.19 Push sliding collar onto snap connector body ............................................27!
6.20 Refit circlip onto snap connector body........................................................27!
6.21 Test spring operation and hose sealing by pushing complete hose on and
off the Inflator unit............................................................................................... 28!
7. Testing Instructions ............................................................................ 29!
7.1 Test for leaks and proper operation..............................................................29!

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1. Introduction
1.1 Functional description
The APV300 low profile power inflator is derived from the original A.P.Valve. It has been
ergonomically restyled but continues to be an excellent BCD power inflator with a new very
low profile. The APV300 is a replacement part for post-2007 (BUDDY and AP Diving) BCD’s.
N.B. If you require a replacement for pre-2007 BUDDY BCD’s, you need the
previous version, the AP200.
1.2 Servicing
Before servicing this APV300 inflator, you must receive instruction and certification in the
maintenance of this valve by AP Diving Ltd.
Without the correct training it is possible to configure the APV300 inflator incorrectly in an
unsafe manner. Factory or Dealer prescribed service for this valve is recommended at least
once annually.
WARNING: when servicing the APV300 inflator it is VERY important that all parts that
may suffer wear and tear get replaced. It is also very important that the correct tools are used
to avoid damaging any part of the valve in the disassembly and assembly process. Please
don’t try to save money by re-using parts that really should be replaced during a proper
servicing action.
1.3 Warranty
This APV300 inflator is covered by APD’s 2-year warranty against defects in materials or
workmanship. This warranty is only extended to the original purchaser, and is not
transferable. For more information, be sure to read the warranty section of the user manual,
and the purchaser should save the sales receipt.
A copy of the receipt must be presented whenever obtaining warranty service.
1.4 Copyright and Applicable Law
This Maintenance Manual is copyrighted, all rights reserved. It may not, in whole or in part,
be copied, photocopied, reproduced, translated, or reduced to any electronic medium
(including the Internet) or machine-readable form without prior consent in writing from AP
Diving Ltd.
All products are sold on the strict understanding that only English Law applies in cases of
warranty claims and product liability, regardless of where the equipment is purchased or
used. Should a claim be made then the venue for this would be in Truro, England.
© 2015 AP Diving Ltd.
APV300 inflator Maintenance Manual

AP Diving Ltd. APV300 Inflator Maintenance Manual
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2. APV300 inflator Exploded Diagram and Parts List
2.1 APV300 inflator Main Assembly
NUMBER
DESCRIPTION
PART NUMBER
QUANTITY
1
Button
APV-100-31
1
2
Spring
AP-100-36
1
3
Stem
APV-300-2
1
4
Back end rubber
AP-100-38
2
5
APV300 moulded body
APV-300-1
1
6
Back end washer
AP-100-39
1
7
Stem retainer
APV-100-12
1
8
BS015 O-ring
BS-015-N70
1
9
Inlet stem
APV-200-10
1
10
BS010 O-ring
BS-010-N70
1
11
Mesh filter
AP-100-41
1
12
Direct feed body
AP-200-12-N
1
13
Core valve
APV-100-44
1
14
Direct feed button
AP-200-14N
1
15
Button cap
AP-100-14
1
16
Cap retainer
APV-100-13
1

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2.2 AP50 Inflator Hose Assembly
NUMBER
DESCRIPTION
PART NUMBER
QUANTITY
1
Collar circlip
AP-50-P6
1
2
Sliding collar
AP-50-P1
1
3
Spring
AP-50-P5
1
4
O-ring
BS-011-N70
1
5
Schraeder valve
AP-100-44
1
6
Ball bearing
AP-50-P7
4
7
Snap connector body
AP-50-P2
1
8
Hose collar
AP-50-P3
2
9
Oxygen heat shrink (optional)
HS-01
1
10
Hose
AP-50-C
1
11
3/8” UNF hose end
AP-50-P4
1
12
O-ring
BS-903-N70
1

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3. Service Kit Contents and Tools
3.1 Service Kit Contents
WARNING: When replacing O-rings, next to the size, the hardness of the O-rings
(declared in degrees Shore, and indicated by the suffixes N70 or N90) is ESSENTIAL for
proper operation. AP Diving deliberately chooses the N70 hardness of the
O-rings for the APV300 inflator.
If, against our recommendation, you choose to select your O-rings to come from another
source than AP Diving Ltd., make sure you select the right type in size AND hardness AND
material (composition).
The main service kit for the APV300 inflator has part number APV300A:
SERVICE KIT DESCRIPTION
PART NUMBER
APV300 Inflator Service Kit
This is the primary service kit with all parts that
should be replaced during regular service
APV300A

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3.2 Special Tools needed
When servicing the APV300 inflator, the following special tool is needed:
DESCRIPTION
PART NUMBER
Tool for removing/replacing the core valve and Schraeder valve
AP50E
AP50E
3.3 Standard Tools needed
Besides the special tools mentioned above, there are no special tools needed for servicing
the APV300 inflator valve.
Normal tools needed are:
- Pliers;
- O-ring picking tools;
- Oxygen-compatible or Silicon grease (depending on the gas the inflator is exposed to)
osee chapter 5 for remarks about when you need to keep this device in oxygen
service;
- (Access to) an ultrasonic bath for cleaning the metal parts.
WARNING: Do NOT use aggressive chemicals. They might damage the metal plating of
the APV300 inflator. Use an ultrasonic cleaning bath with a suitable cleaning fluid.
A very good cleaning fluid is Biox “O2” immersion fluid. See WWW.BIOXINT.COM for further
information and distributors.
The use of rubber gloves while re-assembling the APV300 inflator is recommended to avoid
rendering the APV300 inflator oxygen unclean due to human touch.

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4. Disassembly Instructions
4.1 Remove stainless steel pin (if fitted) that holds the pull cord to the
dumping elbow
- Push the stainless steel pin out of the main body.
oThe pin can be just pushed out. It is not screwed in; it is held in place by
friction.
4.2 Unscrew stem retainer from main body
- Unscrew counter-clockwise.
- This retainer needs to be replaced during service.

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4.3 Remove inlet stem from main body
- Pull it out straight.
4.4 Remove O-ring from inlet stem
- This O-ring needs to be replaced during service.
4.5 Unscrew cap retainer from main body
- Unscrew counter-clockwise.
- This retainer needs to be replaced during service.