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18.

  RE-BLOCKING PROCEDURE

Note!

 

Prior to re-blocking the battery, check the integrity of the battery case, lid, connector and lid seal. Renew if 

damaged or showing signs of deterioration.

When re-blocking a battery ensure that the correct re-blocking kit is used. i.e. denoted by ampere-hour rating.

 

Warning!

 

Short circuit currents will exceed 2000 amps; all tools must be insulated. Care must be taken with all items  

 

of metal in clothing and jewellery, e.g. buckles, zips, rings, watches, chains etc. Failure to pay attention to 

 

this warning could result in serious injury or death. Battery and monoblocs are “live” throughout this 

 procedure.

 

Follow the instructions below carefully: -

 

a) Ensure that all parts of the re-blocking kit are present.

 

b) Remove and retain the four lid screws and washers.

 

c) Remove and retain the lid.

 

d) Remove and discard the nuts, washers and metal strip laminations from the rear monobloc terminals.

 

e) Remove and discard the nuts and washers from the front terminals and lift off the laminations.

 

Note!

 

Do not remove the front laminations from the main battery connectors.

 

f)  Remove the expended monoblocs and replace with the new monoblocs.

 

g) Reconnect the front laminations using the nuts and washers provided in the re-blocking kit. Tighten the 

 

  terminal nuts using a calibrated torque wrench set to 3.9 Nm 35 pound-force inch (lbf-in).

 

Note!

 

Over tightening the terminal nuts may result in fracturing of terminal posts.

 

h)  Connect the rear laminations across the back two terminal posts of the monoblocs using the nuts and 

 

  washers provided in the re-blocking kit. Tighten the terminal nuts using a torque wrench set to 3.9 Nm  

 

  (35 pound-force inch (lbf-in)).

 

i)    Replace battery case lid, finger tighten all four lid screws prior to torque tightening to 1.0 Nm (9 pound-force 

 

  inch (lbf-in)).

 

Note!

 

Over tightening of the screws will cause cracking of the battery case around the screw location 

 holes.

14

Summary of Contents for HAWKER 9250-0083

Page 1: ...AEROSPACE Sealed Lead Acid Batteries Aircraft Battery Maintenance Manual UK Sealed Lead Acid Batteries Aircraft Battery Maintenance Manual UK...

Page 2: ...TANT Please read this manual immediately on receipt of the battery ies before unpacking and installing Failure to comply with these instructions will render any warranties null and void to the extent...

Page 3: ...SPECTION 9 8 2 VOLTAGE CHECKS 9 9 CHARGING PROCEDURE 10 10 ROUTINE MAINTENANCE 10 11 SERVICE PERIOD 11 12 CAPACITY TEST 11 13 REJECTION PROCEDURE 12 14 DEEP DISCHARGE RECOVERY 12 15 UNSCHEDULED REMOVA...

Page 4: ...id distilled water or alkali to the battery The Hawker 24 volt aircraft battery covered by this maintenance manual consist of two 12 volt valve regulated monoblocs connected in series enclosed in a po...

Page 5: ...ately Clothing contaminated by acid should be washed in water Electrolyte is highly corrosive In the normal operation of this battery contact with acid isn t possible If the cell containers are damage...

Page 6: ...ampere discharge for 1 hour down to a battery voltage of 20 volts By conventional definition the battery is deemed airworthy if it delivers its rated capacity for 48 minutes down to a voltage of 20 vo...

Page 7: ...administered in accordance with paragraph 9 However it is advisable to conduct an inspection and open circuit voltage check after 12 months and top up charge in accordance with paragraph 9 if necessar...

Page 8: ...rity Nominal battery voltage and number of cells Rated capacity Safety instructions where applicable Warning Short circuit currents will exceed 2000 amps all tools must be insulated Care must be taken...

Page 9: ...ttery can be issued for service 8 2 4 If the OCV is equal to or less than 25 3 volts but greater than 20 0 volts the battery needs to be charged 8 2 4 1 Charge the battery in accordance with paragraph...

Page 10: ...he exterior of the battery casing for signs of damage and cracks Examine the battery terminal for signs of damage corrosion and water dirt ingress clean as necessary Always ensure that the battery lid...

Page 11: ...one hour rate and measuring the time required in minutes to reach the cut off voltage Discharge the battery at the appropriate constant current value found in Figure 5 at 20 2 C to an end voltage of 2...

Page 12: ...y in accordance with paragraph 9 and notify EnerSys or your distributor of failure If the battery has an OCV of less than 20 volts it is considered to have been abused Over discharging the battery to...

Page 13: ...lass 8 Proper Shipping Name BATTERIES WET NON SPILLABLE electric storage Packing Group ADR not assigned Label required Corrosive ADR RID New and spent batteries are exempt from all ADR RID special pro...

Page 14: ...ashers and metal strip laminations from the rear monobloc terminals e Remove and discard the nuts and washers from the front terminals and lift off the laminations Note Do not remove the front laminat...

Page 15: ...ne maintenance or unscheduled maintenance vii Date of battery returned to storage viii Date of any failures ix Date of any returns to manufacturer x OCV prior to any discharge Dispose of the battery i...

Page 16: ...V Elcon None 38 0 9750E0640 9750E0654 25Ah 24V Elcon None 27 0 9750E0645 25Ah 24V Elcon 1 27 0 9750E0647 9750E0652 25Ah 24V Elcon 1 27 0 9750E0650 25Ah 24V Spade None 27 0 9750E0658 25Ah 24V Canon 1 2...

Page 17: ...e as per paragraph 13 0 Issue Battery Reject battery Charge battery as per paragraph 9 0 Charge battery as per paragraph 9 0 Charge battery as per paragraph 9 0 25 5 Volts 25 3 25 5 Volts 25 3 Volts 2...

Page 18: ...attery as per paragraph 9 0 48 minutes Second time 48 minutes First time 48 minutes Capacity test as per paragraph 12 0 Stand for 4 hours Follow Rejection procedure as per paragraph 13 0 Reject batter...

Page 19: ...19 Intentionally Left Blank...

Page 20: ...n support your requirements through our vast network of approved maintenance distributors EnerSys EMEA EnerSys EMEA EH Europe GmbH EH Europe GmbH L wenstrasse 32 L wenstrasse 32 8001 Z rich 8001 Z ric...

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