Annexure 3.1 lists reason for guide ring broken as: "1) Axle guide is hitting lower spring seat 2) Weld joint of lower spring seat and tube is porous or cracked."

Table 3.19 shows the nominal stroke as 110 mm for vertical shock absorbers.

Section 319f states: "the protection cover of the shock absorber should be pressed into position on the piston rod disc and spot welded at six points around the periphery."

Section 319f states: "When their capacities vary beyond ±20% of their specified values, or after 4 lakh kilometers or alternate POH, whichever is earlier."

Section 319g states: "Fill each side bearer oil-bath with 2 litres of any of the following approved brands of oils."

Section 319d states: "Safety straps of the axle box wing lugs and bogie bolster should be adjusted so as to ensure a minimum clearance of 40 mm."

Section 319d states: "ensuring that the bogie frame height is 686 ± 5 mm."

Section 319d states: "The maximum diametrical clearance between the lower spring seat and guide bush should not exceed 1.6 mm."

Table 3.18 shows for "863 to 840 mm" the thickness of hard packing ring is 26 mm.

Section 319d lists three approved brands: Servoline 100 (IOC), Yantrol 100 (HPC), and Bharat univol-100 (BPC).

Section 319d states: "Put dash pot oil of approved brand in lower spring seat to a level of 60 mm from bottom."

Section 319d states the variation "among the four wheel sets in the same coach as 13 mm."

Section 319d states: "Select the wheel sets such that the maximum variation in tread diameter between the wheels on same axle as 0.5 mm."

Section 319c states: "Additional compensating ring to maintain bolster clearance of 40 ± 3 can be added."

Section 319c states: "Ensure that bolster springs with height (under test load) variation within 2 mm are selected in the same group of springs for each bogie assembly."

Section 319c states: "Grease the BSS pins, hanger blocks, anchor link silent block pins and anchor link brackets with graphite grease."

Section 319b states: "While tightening the guide cap, it should be ensured that guide bush sits tight against the rubber packing ring and the holes in the guide are in alignment with corresponding holes in the guide bush."

Section 319b states: "Ensure that the maximum dimensional clearance between the pins and bushes is 1.5 mm."

Section 319b states: "Ensure that the cotters are split minimum 90° and not slack in the pins."

Section 318 states: "'Z' lever pin shall be to RDSO Sketch 98127."

Section 318 states: "Replace the worn, damaged, etc. brake gear pins with new ground finished and chromium plated pins."

Section 318 states: "Replace the brake blocks if worn out to thickness of 20 mm or below."

Section 318 states: "Nylon 66 brake gear bushes to RDSO STR No. C-8107 should be fitted in brake gear."

Section 316c point 4 states: "Replace all the axle box housing crown bolt and screwing piece by rubber stoppers."

Section 316c states: "Any slight discrepancy in location can be rectified by suitable local heating of the frame."

Section 316c states: "The relevant axle guides should be cut using special gouging nozzles (PO 18 or 19) to prevent undercutting of bogie frame."

Table 3.7 shows diagonal gauge for axle guide as "3612±1.0 mm" for both bogie types.

Table 3.7 shows for 16.25t bogies: "Longitudinal gauge for BSS brackets - 1500±1.0 mm (750±0.5 mm from longitudinal center-line)."

Section 316c specifies the wear limit as "0.5mm for BSS bracket bush."

Section 316c states: "If the BSS brackets or axle guides are worn (limits: 1mm for axle guide...), damaged or cracked, they should be replaced."

Section 316b states: "Lift the bogie frame along with the bolster using overhead crane till all the eight axle guides disengage from the lower spring seats."

Opening vent screws equalises pressure and allows the dash pot components to separate more easily when lifting the frame.

Section 316a states: "Remove all the oil from the side bearer oil bath" before washing.

Section 315 states: "Hydraulic shock absorbers with capacity of ±600kg at a speed of 10 cm/sec. are fitted."

Section 313 states: "These links have pin connections at both ends and, therefore, can swivel freely."

Section 313 states: "This device has been provided on bogies between the lower spring plank and the bolster to prevent lateral thrust on the bolster springs which have not been designed to take the lateral forces."

Section 312b states: "Bogie brake rigging has been modified to incorporate a total mechanical advantage of 7.644 per bogie for non-ac coaches and 8.40 per bogie for ac coaches."

Section 312a states: "In 13 t axle load bogie the four lever used in bogie brake rigging are each with lever ratio of 1:1 and hence the total Mechanical advantage in a bogie is 4."

Section 312a states: "In 16.25 t axle load bogie the four lever used in bogie brake rigging are each with lever ratio of 1:1.376."

Note P2 states: "The hard ground plate should be renewed when the wear exceeds 1.5mm that is, thickness is less than 8.5 mm or ridges are observed on the plate."

Note P1 states: "Bronze Wearing Piece should be renewed when the wear on the mating surface reaches 3mm that is, height is less than 42 mm or damages occur to the oil grooves."

The spherical top surface allows the wearing piece to accommodate slight angular misalignments between the bogie and coach body while maintaining full surface contact.

Section 308 states: "It is equipped with rubber silent block bushes which tend to centralise the bogies with respect to the body and, to some extent, control and damp the angular oscillations of the bogies."

Section 307 specifies: "The springs are manufactured from peeled and centreless ground bar of chrome vanadium/chrome molybdenum steel conforming to STR No. WD-01-HLS94 (Rev.1)."

Section 306 states: "The two anchor links diagonally positioned are provided with silent block bushes. The links prevent any relative movement between the bogie frame and coach body."

Section 305 mentions: "Special screws with copper asbestos washers are screwed on the tapped hole to make it air tight."

Section 304 states: "As it is not possible in open line to distinguish between modified and unmodified arrangements, 40mm oil level is standardised for both."

Section 304 explains: "These guides are fitted with guide caps having nine holes... through which oil in the lower spring seat passes under pressure during dynamic oscillation of coach and provide necessary damping."

Section 302A states: "Isolation of vibration is effected by rubber pads in primary and secondary suspension."

Section 302b clearly states: "No vertical weight transfer is effected through bogie pivot and the pivot acts merely as a centre of rotation and serves to transmit tractive/braking forces only."