1、MIL-V-5525C (1) Lb 77777Ob OLLI737 7 .- y MIL-V-5525C AMENiIMENi 1 21 January 1974 MILITARY SPECLVICATION VALVES, AIRCRAFT POWER BRAKE This amendment forms a part of Military Specifi- cation MIL-V-5525C, dated 21 October 1959, and is approved for use by all Departments and Agen- cies of the Departme
2、nt of Defense. Page 1, paragraph 1.1 - Delete and substitute: 1.1 This specification covers power brake valves for use in type I ?I (-ho to 71*C aircraft hydraulic wheel brake subsystems having operating pressures not exceeding 3,000 pounds per inch (psi)“. Page 1, paragraph 2.1, under military spec
3、ifications - Add: (-65O to 1600) and type II (-54O to 135OF (-65O to Y75OF) “MIL-H-5440 - Hydraulic Systems, Aiycraft Type I and II, Desigii “MIL-B-8584 - Brake Systems , Wheel , Airkaft , Design of. Installation, And Data Requirements for“. Page 2, paragraph 3.3 - Delete and substitute: 3.3 Design
4、and Construction I? 3.3.1 General - The configuration and dimensions of power brake valves shall conform to the applicable manufacturers drawing as governed by specification MIL-H-5440. 3.3.2 Output pressure - The output pressure requirements shall be governed by the brake system being operated. 3.3
5、.3 Trave1 - Full plunger travel shall give maximum pressure at The pressure versus travel curve shall be the brake port of the valve. as shown on the applicable specification control drawing“. Page 2, paragraph 4.1 - Add to the beginning of paragraph: 11 Responsibility for inspection“. Provided by I
6、HSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,- MIL-V-5525C (1) 16 7799906 01BLi938 9 .- - - - MI L-V- 5 525C AMENDMENT 1 Page 3, paragraph 4.5.2 - Delete entire paragraph and substitute: “Samplingtests: Inspection lot sampling tests shall be conducted on each l
7、ot. One brake valve shall be selected at random from each 100 valves or fraction thereof for the following tests described uider 4.7 Test Methods : Immersion (4.7.1.1) Burst Pressure (4.7.4) En duran ce (4.7.6) Pressure Compensation (4.7.7) Extreme Temperature Operation (4.7.8) Packing, Packaging an
8、d Marking (4.8)“ Page 3, paragraph 4.5.5.2 - Delete entire paragraph and substitute: “Acceptance test failure: test listed in paragraph 4.5.1 Individual Tests shall be cause for re- jection of that unit (rework and retesting is acceptable). of any sampling test unit from a lot shall be cause for rej
9、ection of the entire lot. or industrial) full particulars concerning the cause of rejection and the action taken to correct the defects in the lot shall be furnished in writing before the lot can be retested.“ Page 5, paragraph 4.7.3, line 5 - Delete: Failure of any unit to pass any indcvidual Failu
10、re Once a lot has been rejected by a procuring agency (Government “as specified in 3.3“ Page 5, paragraph 4.7.3 - Add: individual tests which shall be conducted at 21 to 43OC (70 to llOF). Page 6, paragraph 4.7.6 - Add: “Type II components shall be tested at 135OC (275OF) except for “Type II compone
11、nts shall be tested at 107OC (225OF) except 25% of the full stroke cycles (2500 cycles) and 25% of the 60% of full load cycles (22s 500 cycles ). shall be conducted at 1350C (2750) , Page 6, paragraph 4.7.8, line 5 - After “(-65O + 1.60) Insert: II for Type 1 hydraulic systems and from -54 to 135OC
12、(-65 to +2750F) for Type II hydraulic systems. b -I1* Page 8, paragraph 4.7.8 - Delete entire last sentence. Page 2 of 3 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-Page 8, paragraph 4.7.8.3, Line 4 - Delete: II or higher under the conditions specified in 4.7.8 Custodians : Army - AV Navy - AS Air Force - 11 Preparing activity : Navy - AS (Project No. 1630-0i40) Page 3 of 3 MIL-V-5525C (1) Lb 77777Ob OL4737 O = MI L-v- 5 5 25 c AMENDMENT 1 r Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-
