Liebherr a311 litronic wheel excavator service repair manual sn 20222 and up

Page 5

Service Manual

Modification of series

Modification of series Item (a)

Type of modification Modified actuation of the pressure-relief valves for slewing gear Joint control line Xab replaced by separate control lines Xa / Xb for each valve

Affected models A 314 Li: 11147 A 316 Li: 11152 A 316 Li industrial: 11178

Additional orifice 126 in connection P of valve 125 Modified measuring connections Measuring connections 137 / 138 are moved from the side to the top (b)

Modified spool

A 314 Li: 11820

Spool for slewing gear (change in design from restricted to blocked outlet)

A 316 Li: 11822 A 316 Li industrial: 11823

Spool for chassis (change in design from restricted to open outlet) (c)

Modified pressure balance 244 for stick cylinder

A 314 Li: 12814 A 316 Li: 12741

Change from pressure balance without shock absorption to pressure balance with 0.4mm shock absorption

A 316 Li industrial: 11846

Additional control line from control valve block connection MLS to pressure balance 244 at spring side connection LSE Modified shuttle valves 227 (a3 /b3) for boom cylinder spool Change from Ă˜ 0.8 mm to Ă˜ 0.6 mm (d)

(e)

Modified fan cycle

A 312 Li: 13289

Installation of coarse filter 15 in the pressure line to oil motor / radiator fan

A 314 Li: 13104

Various modifications to control valve block

A 312 Li: 16275

A 316 Li: 13105

A 314 Li: 16215 Tuning improved. Pressure balance 224 pilotcontrolled. Shuttle valve 107 integrated into control block. Central nozzle 109 screwed in. New slewing gear module (check valve 123 before spool 120).

A 316 Li: 16141 A 316 Li industrial: 16286

Modified TC valve 125 Integrated restrictor 126 and bypass line with restrictor 129

1.02.1 MJFCIFSS


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